申请人:Tanabe Seiyaku Co., Ltd.
公开号:US05792861A1
公开(公告)日:1998-08-11
The present invention provides a process for the production of a 4-substituted azetidinone. The process comprises reacting ##STR1## wherein R represents a hydrogen atom or a protecting group for N, R.sup.1 represents an alkyl which may be a substituent having an unprotected or protected hydroxyl group; and Z represents a leaving group; with ##STR2## wherein R.sup.2 represents hydrogen or alkyl, R.sup.3 and R.sup.4 each represent hydrogen, alkyl, alkenyl, alkynyl, phenyl, cycloalkyl, or naphthyl, or R.sup.3 and R.sup.4, together with the carbon atom to which they are bonded, form a ring system; X and Y each represent oxygen, sulfur or N-r.sup.1, wherein r.sup.1 represents a hydrogen atom or lower alkyl; A, B, D and E each represent nitrogen or C-r.sup.2, wherein r.sup.2 represents hydrogen, halogen, lower alkyl or lower alkoxy, provided that at least two of A, B, D and E are C-r.sup.2 ; and a ring involving G, J and K has two carbon/carbon double bonds therein and one of G, J and K represents oxygen, sulfur or N-r.sup.1 while the remaining two represent C-r.sup.2 ; in the presence of M(Hal).sub.n (R.sup.5).sub.m (V) wherein M represents a metal atom; Hal represents halogen; R.sup.5 represents lower alkyl, lower alkoxy, phenoxy, substituted phenoxy or cyclopentadienyl; and n and m are each 0, 1, 2, 3, 4 or 5, provided that n+m stands for the valence of M; and a base to thereby give: ##STR3##
本发明提供了一种生产4-取代氮杂环戊酮的方法。该方法包括将式(I):其中R表示氢原子或N的保护基,R1表示可以是具有未保护或保护的羟基的取代基的烷基;Z表示离去基;与式(II):其中R2表示氢或烷基,R3和R4分别表示氢,烷基,烯基,炔基,苯基,环烷基或萘基,或R3和R4与它们键合的碳原子形成一个环系统;X和Y分别表示氧,硫或N-R1,其中R1表示氢原子或低烷基;A、B、D和E分别表示氮或C-R2,其中R2表示氢,卤素,低烷基或低烷氧基,至少两个A、B、D和E是C-R2;并且涉及G、J和K的一个环中有两个碳/碳双键,其中G、J和K中的一个表示氧,硫或N-R1,而其余两个表示C-R2;在M(Hal)n(R5)m(V)的存在下进行反应,其中M表示金属原子;Hal表示卤素;R5表示低烷基,低烷氧基,苯氧基,取代苯氧基或环戊二烯基;n和m分别为0、1、2、3、4或5,前提是n+m代表M的价;并加入碱,从而得到:式(III)。