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【结 构 式】

【分子编号】10468

【品名】(1S,2S,3R,4S,7R,9R,10S,12R,15S)-4,12-bis(acetoxy)-1,15-dihydroxy-10,14,17,17-tetramethyl-11-oxo-9-[(triethylsilyl)oxy]-6-oxatetracyclo[11.3.1.0(3,10).0(4,7)]heptadec-13-en-2-yl benzoate

【CA登记号】

【 分 子 式 】C37H52O11Si

【 分 子 量 】700.89878

【元素组成】C 63.41% H 7.48% O 25.11% Si 4.01%

与该中间体有关的原料药合成路线共 1 条

合成路线1

该中间体在本合成路线中的序号:(XIV)

A new partial synthesis for taxol has been reported: The cyclization of N-(4-methoxyphenyl)benzylideneimine (I) with acetoxyacetyl chloride (II) by means of triethylamine in dichloromethane gives cis-3-acetoxy-1-(4-methoxyphenyl)-4-phenylazetidin-2-one (III), which is treated with ceric ammonium nitrate in acetonitrile to afford cis-3-acetoxy-4-phenylazetidin-2-one (IV). Hydrolysis of (IV) with KOH in THF-water yields cis-3-hydroxy-4-phenylazetidin-2-one (V), which is submitted to optical resolution giving the (3R,4S)-isomer (VI). The reaction of (VI) with ethyl vinyl ether (VII) by means of methanesulfonic acid in THF affords (3R,4S)-3-(1-ethoxyethoxy)-4-phenylazetidin-2-one (VIII), which is benzoylated with benzoyl chloride (IX) and butyllithium in hexane to give (X). Opening of the azetidine ring of (X) with KOH in THF-water gives (2R,3S)-3-(benzamido)-2-(1-ethoxyethoxy)propanoic acid (XI), which is cyclized with potassium tert-butoxide and methanesulfonyl chloride to (4S,5R)-5-(1-ethoxyethoxy)-2,4-diphenyl-5,6-dihydro-4H-1,3-oxazin-6-one (XII). Finally, this compound is condensed with 7-O-(triethylsilyl)baccatin III (XIV) [prepared from 10-deacetylbaccatin III (XIII) by successive reaction with triethylsilyl chloride and acetyl chloride] by means of dimethylaminopyridine (DMAP) in pyridine.

1 Holton, R.A. (University of Florida); Method for preparation of taxol using an oxazinone. US 5015744 .
中间体序号 中间体编号 品名 CAS号 分子式 供应商 用于合成
(I) 10455 N-(4-Methoxyphenyl)-N-[(Z)-benzylidene]amine; 4-Methoxy-N-[(Z)-benzylidene]aniline 783-08-4 C14H13NO 详情 详情
(II) 10456 Acetoxiacetil chloride; 2-chloro-2-oxoethyl acetate 13831-31-7 C4H5ClO3 详情 详情
(III) 10457 (3R,4S)-1-(4-methoxyphenyl)-2-oxo-4-phenylazetanyl acetate C18H17NO4 详情 详情
(IV) 10458 (3R,4S)-2-oxo-4-phenylazetanyl acetate C11H11NO3 详情 详情
(V) 63030 cis-3-Hydroxy-4-phenyl-2-azetanone; (3R*,4S*)-3-Hydroxy-4-phenyl-2-azetanone C9H9NO2 详情 详情
(VI) 10459 (3R,4S)-3-Hydroxy-4-phenyl-2-azetanone C9H9NO2 详情 详情
(VII) 18762 1-Ethoxyethylene; Ethyl vinyl ether;Ethoxyethene 109-92-2 C4H8O 详情 详情
(VIII) 10462 (3R,4S)-3-(1-Ethoxyethoxy)-4-phenyl-2-azetanone C13H17NO3 详情 详情
(IX) 10463 Benzoyl chloride 98-88-4 C7H5ClO 详情 详情
(X) 10464 (3R,4S)-1-Benzoyl-3-(1-ethoxyethoxy)-4-phenyl-2-azetanone C20H21NO4 详情 详情
(XI) 10465 (2R,3S)-3-(Benzoylamino)-2-(1-ethoxyethoxy)-3-phenylpropionic acid C20H23NO5 详情 详情
(XII) 10466 (4S,5R)-5-(1-Ethoxyethoxy)-2,4-diphenyl-4,5-dihydro-6H-1,3-oxazin-6-one C20H21NO4 详情 详情
(XIII) 10467 (1S,2S,3R,4S,7R,9S,10S,12R,15S)-4-(acetoxy)-1,9,12,15-tetrahydroxy-10,14,17,17-tetramethyl-11-oxo-6-oxatetracyclo[11.3.1.0(3,10).0(4,7)]heptadec-13-en-2-yl benzoate 32981-86-5 C29H36O10 详情 详情
(XIV) 10468 (1S,2S,3R,4S,7R,9R,10S,12R,15S)-4,12-bis(acetoxy)-1,15-dihydroxy-10,14,17,17-tetramethyl-11-oxo-9-[(triethylsilyl)oxy]-6-oxatetracyclo[11.3.1.0(3,10).0(4,7)]heptadec-13-en-2-yl benzoate C37H52O11Si 详情 详情
Extended Information