Maytansinoids, their production and therapeutic compositions containing them
申请人:Takeda Chemical Industries, Ltd.
公开号:EP0025496A1
公开(公告)日:1981-03-25
Novel maytansinoids of the formula:
wherein
X is hydrogen or chlorine,
R1 is C2-4 alkyl,
R2 is C2-8 alkyl which may be substituted or methyl which is substituted, have antimicrobial, antimitotic and antitumor activities.
YAMADA, YOICHI;YASUDA, HEINOSUKE, SYNTHESIS (BRD),(1990) N, C. 768-770
作者:YAMADA, YOICHI、YASUDA, HEINOSUKE
DOI:——
日期:——
A Convenient Synthesis of Dialkyl (<i>E</i>)-2,3-Dicyanobutendioates
作者:Yoichi Yamada、Heinosuke Yasuda
DOI:10.1055/s-1990-27009
日期:——
Dialkyl (E)-2,3-dicyanobutendioates 4, potentially useful intermediates for the synthesis of a wide variety of heterocyclic compounds, are conveniently prepared by the reaction of alkyl bromocyanoacetates 2 with potassium thiocyanate in acetonitrile followed by treatment with water. The starting alkyl bromocyanoacetates are prepared by the photochemical reaction of the appropriate alkyl cyanoacetate with bromine in carbon tetrachloride.