申请人:Schering Aktiengesellschaft
公开号:US04322349A1
公开(公告)日:1982-03-30
A process for preparing a 6-methylene-.DELTA..sup.4 -3-keto steroid of the formula ##STR1## wherein R is hydrogen, alkoxy of up to 6 carbon atoms or acyloxy of up to 6 carbon atoms wherein the acyl group is that of a carboxylic acid, and R' is the CD-ring system of a steroid of the androstane or pregnane series, comprising reacting the corresponding .DELTA..sup.4 -3-keto steroid of the formula ##STR2## with a formaldehyde derivative of the formula X(CH.sub.2 O).sub.n Y wherein n is 1, 3 or an integer on the order of 100-1000, and X is C.sub.1-5 alkoxy and Y is C.sub.1-5 alkyl when n is 1, X and Y represent a single bond between the terminal C atom and the terminal O atom when n is 3, and X is hydroxy and Y is hydrogen when n is an integer on the order of 100-1000, in an inert solvent in the presence of a condensation agent which is a strong acid a strongly acidic cation exchanger or a phosphoric acid derivative.
一种制备式的6-亚甲基-Δ4-3-酮类固醇的方法,其中R为氢、最多含有6个碳原子的烷氧基或最多含有6个碳原子的乙酰氧基,其中酰基是羧酸的酰基,R'为雄甾烷或孕烷系列类固醇的CD环系统,包括将相应的Δ4-3-酮类固醇与式的甲醛衍生物反应X(CH2O)nY,其中n为1、3或约为100-1000的整数,X为C1-5烷氧基,Y为C1-5烷基,当n为1时,X和Y代表末端C原子和末端O原子之间的单键,当n为3时,X和Y代表末端C原子和末端O原子之间的单键,当n为约为100-1000的整数时,X为羟基,Y为氢,在惰性溶剂中,在存在强酸、强酸性阳离子交换剂或磷酸衍生物的缩聚剂的情况下进行。