Methylpentynol

Methylpentynol
Systematic (IUPAC) name

3-methylpent-1-yn-3-ol
Clinical data
Trade names	Oblivon
Identifiers
CAS Number	77-75-8^Y
ATC code	N05CM15
PubChem	CID 6494
ChemSpider	21106516^N
UNII	B017BC5B1N^Y
Chemical data
Formula	C₆H₁₀O
Molar mass	98.143 g/mol
SMILES CCC(C)(C#C)O
InChI InChI=1S/C6H10O/c1-4-6(3,7)5-2/h1,7H,5H2,2-3H3^N Key:QXLPXWSKPNOQLE-UHFFFAOYSA-N^N
^NY (what is this?) (verify)

Methylpentynol (Methylparafynol, Dormison, Atemorin) is a tertiary hexanol with hypnotic/sedative and anticonvulsant effects. It was discovered by Bayer in 1913^[1] and was used shortly thereafter for the treatment of insomnia, but its use was quickly phased out in response to newer drugs with far more favorable safety profiles.^[2]^[3]^[4]^[5]

Synthesis

Methylpentynol is prepared by reaction of butanone with sodium acetylide.

References

↑ DE patent 289800, "Verfahren zur Darstellung der Oxyalkylderivate von Kohlenwasserstoffen", issued 1913-11-30, assigned to Bayer, Leverkusen
↑ Hirsh, H. L.; Orsinger, W. H. (1952). "Methylparafynol--a new type hypnotic. Preliminary report on its therapeutic efficacy and toxicity". American practitioner and digest of treatment 3 (1): 23–26. PMID 14903452.
↑ Schaffarzick, R. W.; Brown, B. J. (1952). "The anticonvulsant activity and toxicity of methylparafynol (dormison) and some other alcohols". Science 116 (3024): 663–665. doi:10.1126/science.116.3024.663. PMID 13028241.
↑ Herz, A. (1954). "A new type of hypnotic; unsaturated tertiary carbinols; experimental studies on therapeutic use of 3-methyl-pentin-ol-3 (methylparafynol)". Arzneimittel-Forschung 4 (3): 198–199. PMID 13159700.
↑ Weaver, L. C.; Alexander, W. M.; Abreu, B. E. (1961). "Anticonvulsant activity of compounds related to methylparafynol". Archives internationales de pharmacodynamie et de therapie 131: 116–122. PMID 13783544.
↑ W. Grimene and H. Emde, German Patent 959,485 (1957).

Hypnotics/sedatives (N05C)

GABA_A

Alcohols	2M2B Chloralodol Ethanol Alcohol Ethchlorvynol Methylpentynol Trichloroethanol

Barbiturates	Allobarbital Amobarbital Aprobarbital Barbital Butabarbital Butobarbital Cyclobarbital Ethallobarbital Heptabarb Hexobarbital Mephobarbital Methohexital Pentobarbital Phenallymal Phenobarbital Propylbarbital Proxibarbal Reposal Secobarbital Talbutal Thiamylal Thiopental Vinbarbital Vinylbital

Benzodiazepines	Brotizolam Cinolazepam Climazolam Doxefazepam Estazolam Flunitrazepam Flurazepam Flutoprazepam Haloxazolam Loprazolam Lormetazepam Midazolam Nimetazepam Nitrazepam Phenazepam Quazepam Temazepam Triazolam

Carbamates	Carisoprodol Emylcamate Ethinamate Hexapropymate Meprobamate Methocarbamol Phenprobamate Procymate Tybamate

Imidazoles	Etomidate Metomidate Propoxate

Monoureides	Acecarbromal Apronal (apronalide) Bromisoval Capuride Carbromal Ectylurea

Neuroactive steroids	Acebrochol Allopregnanolone Alphadolone Alphaxolone Eltanolone Hydroxydione Minaxolone Progesterone

Nonbenzodiazepines	Eszopiclone Indiplon Lirequinil Necopidem Pazinaclone Saripidem Suproclone Suriclone Zaleplon Zolpidem Zopiclone

Phenols	Fospropofol Propofol

Piperidinediones	Glutethimide Methyprylon Pyrithyldione Piperidione

Quinazolinones	Afloqualone Cloroqualone Diproqualone Etaqualone Mebroqualone Mecloqualone Methaqualone Methylmethaqualone Nitromethaqualone

Volatiles/gases	Acetophenone Acetylglycinamide chloral hydrate Centalun Chloral betaine Chloral hydrate Paraldehyde

Others	Bromide compounds Lithium bromide Potassium bromide Sodium bromide Chloralose Clomethiazole Dichloralphenazone Gaboxadol Loreclezole Kava constituents Kavalactones Petrichloral Sulfonylalkanes Sulfonmethane (sulfonal) Tetronal Trional Triclofos Valerian constituents Isovaleramide Isovaleric acid Valerenic acid

GABA_B

H₁

Antihistamines	Captodiame Cyproheptadine Diphenhydramine Doxylamine Hydroxyzine Methapyrilene Pheniramine Promethazine Propiomazine

Antidepressants	Tricyclic antidepressants Amitriptyline Doxepin Trimipramine, etc. Tetracyclic antidepressants Mianserin Mirtazapine, etc.

Antipsychotics	Typical antipsychotics Chlorpromazine Thioridazine, etc. Atypical antipsychotics Olanzapine Quetiapine Risperidone, etc.

α₂-Adrenergic

5-HT_2A

Antidepressants	Trazodone Tricyclic antidepressants Amitriptyline Doxepin Trimipramine, etc. Tetracyclic antidepressants Mianserin Mirtazapine, etc.

Antipsychotics	Typical antipsychotics Chlorpromazine Thioridazine, etc. Atypical antipsychotics Olanzapine Quetiapine Risperidone, etc.

Others	Niaprazine

Melatonin

Orexin

Others

GABA_A receptor positive allosteric modulators

Alcohols	Brometone Butanol Chloralodol Chlorobutanol (cloretone) Ethanol (drinking alcohol) Ethchlorvynol Isobutanol Isopropanol Menthol Methanol Methylpentynol Pentanol Petrichloral Propanol tert-Butanol (2M2P) tert-Pentanol (2M2B) Tribromoethanol Trichloroethanol Triclofos Trifluoroethanol

Barbiturates	(-)-DMBB Allobarbital Alphenal Amobarbital Aprobarbital Barbexaclone Barbital Benzobarbital Benzylbutylbarbiturate Brallobarbital Brophebarbital Butabarbital/Secbutabarbital Butalbital Buthalital Butobarbital Butallylonal Carbubarb CP-1414S Crotylbarbital Cyclobarbital Cyclopentobarbital Difebarbamate Enallylpropymal Ethallobarbital Eterobarb Febarbamate Heptabarb Heptobarbital Hexethal Hexobarbital Metharbital Methitural Methohexital Methylphenobarbital Narcobarbital Nealbarbital Pentobarbital Phenallymal Phenobarbital Phetharbital Primidone Probarbital Propallylonal Propylbarbital Proxibarbital Reposal Secobarbital Sigmodal Spirobarbital Talbutal Tetrabamate Tetrabarbital Thialbarbital Thiamylal Thiobarbital Thiobutabarbital Thiopental Thiotetrabarbital Valofane Vinbarbital Vinylbital

Benzodiazepines	2-Oxoquazepam 3-Hydroxyphenazepam Adinazolam Alprazolam Arfendazam Avizafone Bentazepam Bretazenil Bromazepam Brotizolam Camazepam Carburazepam Chlordiazepoxide Ciclotizolam Cinazepam Cinolazepam Clazolam Climazolam Clobazam Clonazepam Clonazolam Clorazepate Clotiazepam Cloxazolam Cyprazepam Delorazepam Demoxepam Diazepam Diclazepam Doxefazepam Elfazepam Estazolam Ethyl carfluzepate Ethyl dirazepate Ethyl loflazepate Etizolam EVT-201 FG-8205 Fletazepam Flubromazepam Flubromazolam Fludiazepam Flunitrazepam Flurazepam Flutazolam Flutemazepam Flutoprazepam Fosazepam Gidazepam Halazepam Haloxazolam Iclazepam Imidazenil Irazepine Ketazolam Lofendazam Lopirazepam Loprazolam Lorazepam Lormetazepam Meclonazepam Medazepam Menitrazepam Metaclazepam Mexazolam Midazolam Motrazepam N-Desalkylflurazepam Nifoxipam Nimetazepam Nitrazepam Nitrazepate Nitrazolam Nordazepam Nortetrazepam Oxazepam Oxazolam Phenazepam Pinazepam Pivoxazepam Prazepam Premazepam Proflazepam Pyrazolam QH-II-66 Quazepam Reclazepam Remimazolam Rilmazafone Ripazepam Ro48-6791 Ro48-8684 SH-053-R-CH3-2′F Sulazepam Temazepam Tetrazepam Tolufazepam Triazolam Triflubazam Triflunordazepam (Ro5-2904) Tuclazepam Uldazepam Zapizolam Zolazepam Zomebazam

Carbamates	Carisbamate Carisoprodol Clocental Cyclarbamate Difebarbamate Emylcamate Ethinamate Febarbamate Felbamate Hexapropymate Lorbamate Mebutamate Meprobamate Nisobamate Pentabamate Phenprobamate Procymate Styramate Tetrabamate Tybamate

Flavonoids	6-Methylapigenin Ampelopsin (dihydromyricetin) Apigenin Baicalein Baicalin Catechin EGC EGCG Hispidulin Linarin Luteolin Rc-OMe Skullcap constituents (e.g., baicalin) Wogonin

Imidazoles	Etomidate Metomidate Propoxate

Kava constituents	10-Methoxyyangonin 11-Methoxyyangonin 11-Hydroxyyangonin Desmethoxyyangonin 11-Methoxy-12-hydroxydehydrokavain 7,8-Dihydroyangonin Kavain 5-Hydroxykavain 5,6-Dihydroyangonin 7,8-Dihydrokavain 5,6,7,8-Tetrahydroyangonin 5,6-Dehydromethysticin Methysticin 7,8-Dihydromethysticin Yangonin

Monoureides	Acecarbromal Apronal (apronalide) Bromisoval Carbromal Capuride Ectylurea

Neuroactive steroids	Acebrochol Allopregnanolone Alfadolone Alfaxalone 3α-Androstanediol Androstenol Androsterone Cholesterol DHDOC 3α-DHP 5α-DHP 5β-DHP Etiocholanolone Ganaxolone Hydroxydione Minaxolone Org 20599 Org 21465 Pregnanolone (eltanolone) Progesterone Renanolone SAGE-217 SAGE-689 THDOC

Nonbenzodiazepines	β-Carbolines: Abecarnil Gedocarnil Harmane SL-651,498 ZK-93423; Cyclopyrrolones: Eszopiclone Pagoclone Pazinaclone Suproclone Suriclone Zopiclone; Imidazopyridines: Alpidem DS-1 Necopidem Saripidem Zolpidem; Pyrazolopyrimidines: Divaplon Fasiplon Indiplon Lorediplon Ocinaplon Panadiplon Taniplon Zaleplon; Others: Adipiplon CGS-8216 CGS-9896 CGS-13767 CGS-20625 CL-218,872 CP-615,003 CTP-354 ELB-139 GBLD-345 JM-1232 L-838,417 Lirequinil (Ro41-3696) NS-2664 NS-2710 NS-11394 Pipequaline ROD-188 RWJ-51204 SB-205,384 SX-3228 TGSC01AA TP-003 TPA-023 TP-13 U-89843A U-90042 Viqualine Y-23684

Phenols	Fospropofol Propofol Thymol

Piperidinediones	Glutethimide Methyprylon Piperidione Pyrithyldione

Pyrazolopyridines	Cartazolate Etazolate ICI-190,622 Tracazolate

Quinazolinones	Afloqualone Cloroqualone Diproqualone Etaqualone Mebroqualone Mecloqualone Methaqualone Methylmethaqualone Nitromethaqualone SL-164

Volatiles/gases	Acetone Acetophenone Acetylglycinamide chloral hydrate Aliflurane Benzene Butane Butylene Centalun Chloral Chloral betaine Chloral hydrate Chloroform Cryofluorane Desflurane Dichloralphenazone Dichloromethane Diethyl ether Enflurane Ethyl chloride Ethylene Fluroxene Gasoline Halopropane Halothane Isoflurane Kerosine Methoxyflurane Methoxypropane Nitric oxide Nitrogen Nitrous oxide Norflurane Paraldehyde Propane Propylene Roflurane Sevoflurane Synthane Teflurane Toluene Trichloroethane (methyl chloroform) Trichloroethylene Vinyl ether

Others/unsorted	3-Hydroxybutanal α-EMTBL AA-29504 Avermectins (e.g., ivermectin) Bromide compounds (e.g., lithium bromide, potassium bromide, sodium bromide) Carbamazepine Chloralose Chlormezanone Clomethiazole DEABL Dihydroergolines (e.g., dihydroergocryptine, dihydroergosine, dihydroergotamine, ergoloid (dihydroergotoxine)) DS2 Efavirenz Etazepine Etifoxine Fenamates (e.g., flufenamic acid, mefenamic acid, niflumic acid, tolfenamic acid) Fluoxetine Flupirtine Hopantenic acid Lanthanum Lavender oil Lignans (e.g., 4-O-methylhonokiol, honokiol, magnolol, obovatol) Loreclezole Menthyl isovalerate (validolum) Monastrol Niacin Nicotinamide (niacinamide) Org 25,435 Phenytoin Propanidid Retigabine (ezogabine) Safranal SAGE-547 Seproxetine Stiripentol Sulfonylalkanes (e.g., sulfonmethane (sulfonal), tetronal, trional) Terpenoids (e.g., borneol) Topiramate Valerian constituents (e.g., isovaleric acid, isovaleramide, valerenic acid, valerenol) Unsorted benzodiazepine site PAMs: MRK-409 (MK-0343) TCS-1105 TCS-1205

See also: GABAergics

Alcohols

Straight-chain primary alcohols (1°)	Methanol (C 1) Ethanol (C 2) 1-Propanol (C 3) n-Butanol (C 4) 1-Pentanol (C 5) 1-Hexanol (C 6) 1-Heptanol (C 7) 1-Octanol (C 8) 1-Nonanol (C 9) 1-Decanol (C 10) Undecanol (C 11) Dodecanol (C 12) Tridecan-1-ol (C 13) 1-Tetradecanol (C 14) Pentadecan-1-ol (C 15) Cetyl alcohol (C 16) Heptadecan-1-ol (C 17) Stearyl alcohol (C 18) Nonadecan-1-ol (C 19) Arachidyl alcohol (C 20) Heneicosan-1-ol (C 21) Docosanol (C 22) Tricosan-1-ol (C 23) 1-Tetracosanol (C 24) Pentacosan-1-ol (C 25) 1-Hexacosanol (C 26) 1-Heptacosanol (C 27) 1-Octacosanol (C 28) 1-Nonacosanol (C 29) Triacontanol (C 30)

Other primary alcohols	Isobutanol (C 4) Isoamyl alcohol (C 5) 2-Methyl-1-butanol (C 5) Phenethyl alcohol (C 8) Tryptophol (C 10)

Secondary alcohols (2°)	Isopropanol (C 3) 2-Butanol (C 4) 2-Pentanol (C 5) 2-Hexanol (C 6) 2-Heptanol (C 7) Cyclohexanol (C 6)

Tertiary alcohols (3°)	tert-Butyl alcohol (C 4) tert-Amyl alcohol (C 5) 2-Methyl-2-pentanol (C 6) 2-Methylhexan-2-ol (C 7) 2-Methylheptan-2-ol (C 8) 3-Methyl-3-pentanol (C 6) 3-Methyloctan-3-ol (C 9)

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Methylpentynol

Synthesis

See also

References