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药物详细合成路线

Name Aloperine
Chemical Name (1R,2S,9R,10R)-3,15-Diazatetracyclo[7.7.1.0(2,7).0(10,15)]heptadec-7-ene
      (6aR,7R,13R,13aS)-2,3,4,6,6a,7,8,9,10,12,13,13a-dodecahydro-1H-6,13-methanodipyrido[1,2-a:3,2-e]azocine
CAS 56293-29-9
Related CAS
Formula C15H24N2
Structure
Formula Weight 232.37193
Stage 生物学测试
Company Acad. Tradit. Chin. Med. Mat. Med. (Originator)
Activity/Mechanism Antiallergy/Antiasthmatic Drugs, Antiarrhythmic Drugs, Asthma Therapy, CARDIOVASCULAR DRUGS, RESPIRATORY DRUGS, Mediator Release Inhibitors
Syn. Route 3
Route 1
the acylation of 3-hydroxypiperidine with tosyl chloride followed by oxidation of the oh group with cro3 and h2so4 gives 1-tosylpiperidine-3-one (ii), which is converted into the enol triflate (iii) by reaction with lhmds and phn(so2cf3)2 in thf. the condensation of (iii) with 1-(tert-butoxycarbonyl)-2-vinylpiperidine (iv) by means of pd(oac)2 affords the diene (v), which is selectively deprotected with naoh in methanol to afford the piperidine (vi). the condensation of (vi) with silylated methyl propenoate (vii) by means of triethylamine in dichloromethane gives the nonisolated intermediate (viii) that cyclizes to the tetracyclic compound (ix) (as major isomer). the reaction of (ix) with hf and pyridine in refluxing dichloromethane affords the silylated tetracyclic ketone (x) (as major isomer), which is desilylated with kf, khco3 and h2o2 in refluxing methanol/thf providing the tetracyclic hydroxyketone (xi) (as major isomer), separated by column chromatography. elimination of the oh group of (xi) with c6f5oc(s)-cl, bu3snh and aibn in refluxing benzdene yields the tetracyclic ketone (xii), which is finally reduced with lialh4 in thf.
List of intermediates No.
(z)-3-[3-(acetamido)-2-methylphenyl]-2-propenoyl azide
ethyl 2-ethyl-2,3-dihydro-1-benzofuran-2-carboximidoate (i)
[(3ar,4s,5r,6as)-5-hydroxy-2-oxohexahydro-2h-cyclopenta[b]furan-4-yl]methyl acetate (ii)
[(3ar,4s,5r,6as)-2-oxo-5-[(tetrahydro-2h-pyran-2-yloxy)methyl]hexahydro-2h-cyclopenta[b]furan-4-yl]methyl acetate (iii)
(2r,3ar,4s,5r,6as)-4-(hydroxymethyl)-5-[(tetrahydro-2h-pyran-2-yloxy)methyl]hexahydro-2h-cyclopenta[b]furan-2-ol (iv)
(2s,3ar,4s,5r,6as)-4-(hydroxymethyl)-5-[(tetrahydro-2h-pyran-2-yloxy)methyl]hexahydro-2h-cyclopenta[b]furan-2-ol (v)
butyl(triphenyl)phosphonium bromide (vi)
methyl (z)-7-[(1r,2s,3r,5s)-5-hydroxy-2-(hydroxymethyl)-3-[(tetrahydro-2h-pyran-2-yloxy)methyl]cyclopentyl]-5-heptenoate (viii)
methyl (z)-7-((1r,2s,3r,5s)-5-hydroxy-3-[(tetrahydro-2h-pyran-2-yloxy)methyl]-2-[[(trimethylsilyl)oxy]methyl]cyclopentyl)-5-heptenoate (ix)
methyl (z)-7-((1r,2s,3r,5s)-5-(acetoxy)-3-[(tetrahydro-2h-pyran-2-yloxy)methyl]-2-[[(trimethylsilyl)oxy]methyl]cyclopentyl)-5-heptenoate (x)
methyl (z)-7-[(1r,2s,3r,5s)-5-(acetoxy)-2-(hydroxymethyl)-3-[(tetrahydro-2h-pyran-2-yloxy)methyl]cyclopentyl]-5-heptenoate (xi)
ethyl 2-[3-(trifluoromethyl)phenoxy]acetate (xii)
(2r,3r,4r,5r)-4-(acetoxy)-2-[(acetoxy)methyl]-5-isocyanatotetrahydro-3-furanyl acetate (vii)
Reference 1:
    brosius, a.d.; et al.; total synthesis of (+)-aloperine. use of a nitrogen-bound silicon tether in a intramolecular diels - alder reaction. j am chem soc 1999, 121, 4, 700.

Route 2
vinylpiperidine (iv): the reduction of (r)-piperidine-2-carboxylic acid (xiii) with bh3-thf gives the carbinol (xiv), which is protected at the nh group with tert-butoxycarbonyl anhydride yielding the n-protected carbinol (xv). the swern oxidation of (xv) affords the corresponding aldehyde (xvi), which is finally condensed with trimethylphenylphosphonium bromide and potassium hexamethyldisylazane (khmds) in thf to provide the target intermediate (iv).
List of intermediates No.
(2r,3ar,4s,5r,6as)-4-(hydroxymethyl)-5-[(tetrahydro-2h-pyran-2-yloxy)methyl]hexahydro-2h-cyclopenta[b]furan-2-ol (iv)
chloro[1-[(2r,4s,5r)-4-hydroxy-5-(hydroxymethyl)tetrahydro-2-furanyl]-2,4-dioxo-1,2,3,4-tetrahydro-5-pyrimidinyl]mercury (xiv)
ethyl (e)-3-[1-[(2r,4s,5r)-4-hydroxy-5-(hydroxymethyl)tetrahydro-2-furanyl]-2,4-dioxo-1,2,3,4-tetrahydro-5-pyrimidinyl]-2-propenoate (xv)
(e)-3-[1-[(2r,4s,5r)-4-hydroxy-5-(hydroxymethyl)tetrahydro-2-furanyl]-2,4-dioxo-1,2,3,4-tetrahydro-5-pyrimidinyl]-2-propenoic acid (xvi)
(2r,3r,4r,5r)-4-(acetoxy)-2-[(acetoxy)methyl]-5-[([[(e)-amino(methoxy)methylidene]amino]carbonyl)amino]tetrahydro-3-furanyl acetate (xiii)
Reference 1:
    brosius, a.d.; et al.; total synthesis of (+)-aloperine. use of a nitrogen-bound silicon tether in a intramolecular diels - alder reaction. j am chem soc 1999, 121, 4, 700.

Route 3
silylated propenoate (vii): the reaction of 3-iodopropenoic acid methyl ester (xvii) with phenyldimethylsilyllithium and cucn in thf gives the corresponding silylated compound (xviii), which is then treated with trifluoromethanesulfonic acid in dichloromethane to afford the target intermediate (vii).
List of intermediates No.
(z)-7-[(1r,2s,3r,5s)-5-hydroxy-2-(hydroxymethyl)-3-[(tetrahydro-2h-pyran-2-yloxy)methyl]cyclopentyl]-5-heptenoic acid (xviii)
(2r,3s,4r,5s)-4-(acetoxy)-2-[(acetoxy)methyl]-5-chlorotetrahydro-3-furanyl acetate (xvii)
(2r,3r,4r,5r)-4-(acetoxy)-2-[(acetoxy)methyl]-5-isocyanatotetrahydro-3-furanyl acetate (vii)
Reference 1:
    brosius, a.d.; et al.; total synthesis of (+)-aloperine. use of a nitrogen-bound silicon tether in a intramolecular diels - alder reaction. j am chem soc 1999, 121, 4, 700.

来源:药化网

作者:药化小编

摘要:本文合成路线介绍的是药物中文名苦豆碱;英文名Aloperine;CAS[56293-29-9]

 
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