Asymmetric Synthesis of 1,2,9,9a-Tetrahydrocyclopropa[<i>c</i>]benzo[<i>e</i>]indol-4-one (CBI)
作者:James P. Lajiness、Dale L. Boger
DOI:10.1021/jo102136w
日期:2011.1.21
A short, asymmetricsynthesis of the 1,2,9,9a-tetrahydrocyclopropa[c]benzo[e]indol-4-one (CBI) analogue of the CC-1065 and duocarmycin DNA alkylation subunits is described. Treatment of iodo-epoxide 5, prepared by late-stage alkylation of 4 with (S)-glycidal-3-nosylate, with EtMgBr at room temperature directly provides the optically pure alcohol 6 in 87% yield (99% ee) derived from selective metal−halogen
描述了 CC-1065 的 1,2,9,9a-四氢环丙[ c ]苯并[ e ]吲哚-4-酮 (CBI) 类似物和多卡霉素 DNA 烷基化亚基的简短不对称合成。碘代环氧化物5 是通过用 ( S )-缩水甘油基-3-硝基苯磺酸酯对4进行后期烷基化而制备的,在室温下用 EtMgBr 处理,可直接得到光学纯醇6,收率 87% (99% ee),衍生自选择性金属-卤素交换和随后的区域选择性分子内 6-内-四环素环化。使用 MeMgBr 或i- PrMgBr 也能提供高产率 (82−87%) 的产物,但需要大量的格氏试剂来实现金属-卤素交换和环化。6的O-脱苄基化后7的直接跨环螺环化提供N -Boc-CBI。该方法代表了迄今为止所描述的获得光学纯 CBI 烷基化亚基的最有效(9 个步骤,总体 31%)和最有效(99% ee)的途径。
1-substituted-4-nitroimidazole compound and process for producing the same
申请人:Goto Fumitake
公开号:US20060079697A1
公开(公告)日:2006-04-13
The present invention relates to a 1-substituted-4-nitroimidazole compound represented by the general formula (1) or a salt thereof,
(wherein R is a hydrogen atom, a lower alkoxy group-substituted lower alkyl group, a phenyl-lower alkoxy group-substituted lower alkyl group, a cyano-substituted lower alkyl group, a phenyl-lower alkyl group which may have lower alkoxy groups as the substituents in the phenyl ring or a group of the formula —CH
2
R
A
; X is a halogen atom or a group of the formula —S(O)n—R
1
) and method for preparing the same. The compound of the formula (1) is a useful compound as an intermediate for synthesis of various pharmaceutical and agricultural chemicals, particularly, as intermediates for antitubercular agents.
1-Substituted-4-nitroimidazole compound and method for preparing the same
申请人:Goto Fumitaka
公开号:US20080200689A1
公开(公告)日:2008-08-21
The present invention relates to a 1-substituted-4-nitroimidazole compound represented by the general formula (1) or a salt thereof,
(wherein R is a hydrogen atom, a lower alkoxy group-substituted lower alkyl group, a phenyl-lower alkoxy group-substituted lower alkyl group, a cyano-substituted lower alkyl group, a phenyl-lower alkyl group which may have lower alkoxy groups as the substituents in the phenyl ring or a group of the formula —CH
2
R
A
; X is a halogen atom or a group of the formula —S(O)n-R
1
) and method for preparing the same. The compound of the formula (1) is a useful compound as an intermediate for synthesis of various pharmaceutical and agricultural chemicals, particularly, as intermediates for antitubercular agents.
1-substituted-4-nitroimidazole compound and method for preparing the same
申请人:Goto Fumitaka
公开号:US20080097107A1
公开(公告)日:2008-04-24
The present invention relates to a 1-substituted-4-nitroimidazole compound represented by the general formula (1) or a salt thereof,
(wherein R is a hydrogen atom, a lower alkoxy group-substituted lower alkyl group, a phenyl-lower alkoxy group-substituted lower alkyl group, a cyano-substituted lower alkyl group, a phenyl-lower alkyl group which may have lower alkoxy groups as the substituents in the phenyl ring or a group of the formula —CH
2
R
A
; X is a halogen atom or a group of the formula —S(O)n-R
1
) and method for preparing the same. The compound of the formula (1) is a useful compound as an intermediate for synthesis of various pharmaceutical and agricultural chemicals, particularly, as intermediates for antitubercular agents.
1-Substituted-4-Nitroimidazole Compound and Method for Preparing the Same
申请人:GOTO Fumitaka
公开号:US20120130082A1
公开(公告)日:2012-05-24
The present invention relates to a 1-substituted-4-nitroimidazole compound represented by the general formula (1) or a salt thereof,
(wherein R is a hydrogen atom, a lower alkoxy group-substituted lower alkyl group, a phenyl-lower alkoxy group-substituted lower alkyl group, a cyano-substituted lower alkyl group, a phenyl-lower alkyl group which may have lower alkoxy groups as the substituents in the phenyl ring or a group of the formula —CH
2
R
A
; X is a halogen atom or a group of the formula —S(O)n-R
1
) and method for preparing the same. The compound of the formula (1) is a useful compound as an intermediate for synthesis of various pharmaceutical and agricultural chemicals, particularly, as intermediates for antitubercular agents.