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【结 构 式】

【分子编号】55694

【品名】(4S,5R)-2,2-dimethyl-4-phenyl-3-[(2-propynyloxy)carbonyl]-1,3-oxazolidine-5-carboxylic acid

【CA登记号】

【 分 子 式 】C16H17NO5

【 分 子 量 】303.31472

【元素组成】C 63.36% H 5.65% N 4.62% O 26.37%

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:(VII)

The reaction of (2R,3S)-phenylisoserine (I) with 2-propynyl chloroformate (II) in aq. NaHCO3 gives the N-acylated compound (III), which is treated with diazomethane in ethyl ether (CDI and methanol) to yield the corresponding methyl ester (IV). The reaction of (IV) with 2-methoxypropene (V) and pyridinium p-toluenesulfonate in toluene affords the oxazolidine (VI), which is treated with LiOH in water to provide the oxazolidine-5-carboxylic acid (VII). The esterification of 7-O-(trichloroethoxycarbonyl)baccatin (VIII) with acid (VII) by means of DCC in toluene gives the corresponding ester (IX), which is treated with ammonium tetrathiomolybdate to cleave the oxazolidine ring and yield the 3-amino-2-hydroxypropionyl ester (X). The reaction of (X) with benzoyl chloride (XI) and NaHCO3 in ethyl acetate affords the expected benzamido derivative (XII), which is finally deprotected by means of Zn and AcOH to afford the target paclitaxel.

1 Sharma, A.P.; Sarkar, S. (Dabur India Ltd.); Method of preparation of paclitaxel (Taxol) using 3-(alk-2-ynyloxy)carbonyl-5-oxazolidine carboxylic acid. WO 0266448 .
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) 54908 (2R,3S)-3-amino-2-hydroxy-3-phenylpropanoic acid 136561-53-0 C9H11NO3 详情 详情
(II) 55690 Propargyl chloroformate C4H3ClO2 详情 详情
(III) 55691 (2R,3S)-2-hydroxy-3-phenyl-3-{[(2-propynyloxy)carbonyl]amino}propanoic acid C13H13NO5 详情 详情
(IV) 55692 methyl (2R,3S)-2-hydroxy-3-phenyl-3-{[(2-propynyloxy)carbonyl]amino}propanoate C14H15NO5 详情 详情
(V) 17354 isopropenyl methyl ether; 2-methoxy-1-propene 116-11-0 C4H8O 详情 详情
(VI) 55693 5-methyl 3-(2-propynyl) (4S,5R)-2,2-dimethyl-4-phenyl-1,3-oxazolidine-3,5-dicarboxylate C17H19NO5 详情 详情
(VII) 55694 (4S,5R)-2,2-dimethyl-4-phenyl-3-[(2-propynyloxy)carbonyl]-1,3-oxazolidine-5-carboxylic acid C16H17NO5 详情 详情
(VIII) 10448 (1S,2S,3R,4S,7R,9S,10S,12R,15S)-4,12-bis(acetoxy)-1,15-dihydroxy-10,14,17,17-tetramethyl-11-oxo-9-[[(2,2,2-trichloroethoxy)carbonyl]oxy]-6-oxatetracyclo[11.3.1.0(3,10).0(4,7)]heptadec-13-en-2-yl benzoate C34H39Cl3O13 详情 详情
(IX) 55695 5-((1S,2S,3R,4S,7R,9S,10S,12R,15S)-4,12-bis(acetyloxy)-2-(benzoyloxy)-1-hydroxy-10,14,17,17-tetramethyl-11-oxo-9-{[(2,2,2-trichloroethoxy)carbonyl]oxy}-6-oxatetracyclo[11.3.1.0~3,10~.0~4,7~]heptadec-13-en-15-yl) 3-(2-propynyl) (4S,5R)-2,2-dimethyl-4-phenyl-1,3-oxazolidine-3,5-dicarboxylate C50H54Cl3NO17 详情 详情
(X) 10554 (1S,2S,3R,4S,7R,9S,10S,12R,15S)-4,12-bis(acetoxy)-15-[[(2R,3S)-3-amino-2-hydroxy-3-phenylpropanoyl]oxy]-1-hydroxy-10,14,17,17-tetramethyl-11-oxo-9-[[(2,2,2-trichloroethoxy)carbonyl]oxy]-6-oxatetracyclo[11.3.1.0(3,10).0(4,7)]heptadec-13-en-2-yl benzoate C43H48Cl3NO15 详情 详情
(XI) 10463 Benzoyl chloride 98-88-4 C7H5ClO 详情 详情
(XII) 55696 (1S,2S,3R,4S,7R,9S,10S,12R,15S)-12-(acetyloxy)-15-{[(2R,3S)-3-(benzoylamino)-2-hydroxy-3-phenylpropanoyl]oxy}-1,4-dihydroxy-10,14,17,17-tetramethyl-11-oxo-9-{[(2,2,2-trichloroethoxy)carbonyl]oxy}-6-oxatetracyclo[11.3.1.0~3,10~.0~4,7~]heptadec-13-en-2-yl benzoate C48H50Cl3NO15 详情 详情
Extended Information