[EN] PROCESS FOR THE PREPARATION OF 4-AZASTEROIDS<br/>[FR] PROCEDE POUR LA PREPARATION DE 4-AZASTEROIDES
申请人:LONZA AG
公开号:WO2006002966A1
公开(公告)日:2006-01-12
The invention relates to a process for the preparation of 4-steroids of the formula (I), R1 and R2 are independently selected from the group consisting of hydrogen, F, Cl, Br, I, C1-6-alkyl and C1-6-alkoxy, and R4 is selected from the group consisting of hydrogen, (N, N-di-C1-6-alkylamino)methyl, 2-(N,N-di-C1-6-alkylamino)ethyl, C1-6alkyl, C1-6-alkoxy, phenyl and benzyl, and Q7 represents a carbonyl oxygen atom or is R7-1 and R7-2, wherein one of R7-1 and R7-2 is hydrogen and the other is selected from the group consisting of hydrogen, F, Cl, Br, I, C1-6-alkyl and C1-6-alkoxy and R9 represents hydrogen or F, and Q11 represents a carbonyl oxygen atom or is R11-1 and R11-2, wherein one of R11-1 and R11-2 is hydrogen and the other is selected from the group consisting of hydrogen, cyano, cyano-C1-3-alkyl, acetoxy, COOH and COO-M+, wherein M+ is Na+, K+ or NH+4, and R16 is selected from the group consisting of hydrogen cyano, C1-3-alkyl, cyano-C1-3-alkyl, acetoxy, COOH and COO-M+, wherein M+ is Na+, K+ or NH+4, and COOR represents COOH or COO-M+, wherein M+ is Na+, K+ or NH+4. The three step process comprises (i) a haloform reaction of a 17-acetyl steroid converting the acetyl group into a -COOR group, (ii) subsequent ozonolysis of the A-ring and (iii) re-closure of the A-ring by reaction with an appropriate nitrogen compound of formula H2NR4 to afford a compound of formula (I) above.
该发明涉及一种制备式(I)的4-类固醇的过程,其中R1和R2分别选自氢、F、Cl、Br、I、C1-6-烷基和C1-6-烷氧基组成的群体,R4选自氢、(N,N-二C1-6-烷基氨基)甲基、2-(N,N-二C1-6-烷基氨基)乙基、C1-6-烷基、C1-6-烷氧基、苯基和苄基,Q7代表一个羰基氧原子或是R7-1和R7-2,其中R7-1和R7-2中的一个是氢,另一个选自氢、F、Cl、Br、I、C1-6-烷基和C1-6-烷氧基,R9代表氢或F,Q11代表一个羰基氧原子或是R11-1和R11-2,其中R11-1和R11-2中的一个是氢,另一个选自氢、氰基、氰基-C1-3-烷基、乙酰氧基、COOH和COO-M+,其中M+为Na+、K+或NH+4,R16选自氢氰基、C1-3-烷基、氰基-C1-3-烷基、乙酰氧基、COOH和COO-M+,其中M+为Na+、K+或NH+4,COOR代表COOH或COO-M+,其中M+为Na+、K+或NH+4。这个三步过程包括(i)将17-乙酰基固醇进行卤仿反应,将乙酰基转化为-COOR基团,(ii)随后对A环进行臭氧化,(iii)通过与适当的式H2NR4的氮化合物反应重新闭合A环,得到上述式(I)的化合物。