[EN] INDOLE-YNONE MEDIATED BENZOANNULATION PROCESS FOR THE PREPARATION OF CARBAZOLES- CARBAZOMYCIN A, CALOTHRIXIN B AND STAUROSPORINONE<br/>[FR] PROCÉDÉ DE BENZOANNULATION À MÉDIATION PAR INDOLE-YNONE POUR LA PRÉPARATION DE CARBAZOLES-CARBAZOMYCINE A, DE CALOTHRIXINE B ET DE STAUROSPORINONE
申请人:COUNCIL SCIENT IND RES
公开号:WO2020202180A1
公开(公告)日:2020-10-08
The present invention relates to carbazoles of general formula (I), and process for the preparation thereof: wherein 'R1' is H, C1-C6 alkyl, benzyl, or allyl; R2 is H, C1-C6 alkyl, cyclopropyl, phenyl, aryl, heteroaryl, or NO2; R3 is H, C1-C6 alkyl, cyclopropyl, phenyl aryl, heteroaryl, 4-methoxy phenyl, 4-ethyl phenyl, 2-methyl phenyl, or 2-Fluoro phenyl; R4 is H, benzoyl, -CO2Et, -CHO, Br, or -OMe; R5 is OH, OMOM, OMe, CN, or OTf; R6 is H, or O-alkyl; and R3-R4 is -CHNCH2CH2-. This invention also relates to the process for the preparation of carbazomycin A of Formula (1), calothrixin B of Formula (2) and staurosporinone of Formula (3) involving carbazoles of general formula (I) as an intermediate.
本发明涉及一般式(I)的咔唑类化合物及其制备方法:其中'R1'为H、C1-C6烷基、苄基或烯丙基;R2为H、C1-C6烷基、环丙基、苯基、芳基、杂环芳基或NO2;R3为H、C1-C6烷基、环丙基、苯基、芳基、杂环芳基、4-甲氧基苯基、4-乙基苯基、2-甲基苯基或2-氟苯基;R4为H、苯甲酰基、-CO2Et、-CHO、Br或-OMe;R5为OH、OMOM、OMe、CN或OTf;R6为H或O-烷基;R3-R4为-CHNCH2CH2-。本发明还涉及一种以一般式(I)的咔唑类化合物为中间体的制备咔唑霉素A的方法(式(1))、卡洛替林B的方法(式(2))和斯陶罗斯波林酮的方法(式(3)。