申请人:BASF Aktiengesellschaft
公开号:US04515975A1
公开(公告)日:1985-05-07
Chroman derivatives of the general formula I ##STR1## where A--B is --CH.sub.2 --CH.sub.2 --(Ia), --CH.dbd.CH--(Ib), --CHOH--CH.sub.2 --(Ic) or --CO--CH.sub.2 --(Id), R.sup.1 is --CH.sub.2 --O--R' or ##STR2## where R' is C.sub.1 -C.sub.4 -alkyl or arylmethyl and R" and R'" are each C.sub.1 -C.sub.4 -alkyl, which can also be bonded to form a five-membered or six-membered cyclic acetal, R.sup.2 is C.sub.1 -C.sub.4 -alkyl and R.sup.3 is H or a protective group.
一般公式I的Chroman衍生物为##STR1##其中A--B为--CH.sub.2 --CH.sub.2 --(Ia), --CH.dbd.CH--(Ib), --CHOH--CH.sub.2 --(Ic)或--CO--CH.sub.2 --(Id),R.sup.1为--CH.sub.2 --O--R'或##STR2##其中R'为C.sub.1 -C.sub.4 -烷基或芳基甲基,R"和R'"分别为C.sub.1 -C.sub.4 -烷基,它们也可以连接形成五元或六元环缩醛,R.sup.2为C.sub.1 -C.sub.4 -烷基,R.sup.3为H或保护基。