Process for introducing a thiocarboxylic ester group at the ortho-position of phenols or phenylamines
申请人:SHIONOGI SEIYAKU KABUSHIKI KAISHA
trading under the name of
SHIONOGI & CO. LTD.
公开号:EP0266849A1
公开(公告)日:1988-05-11
A process for introducing thiocarboxylic ester at ortho-position of phenols or phenylamines which comprises reacting a phenyl compound having hydroxy group or optionally substituted amino or cyclic amino group, of which at least one ortho-position is vacant, with C₁ - C₅ alkyl thiocyanate, C₇ - C₁₃ aralkyl thiocyanate or C₆ - C₁₂ aryl thiocyanate in the presence of a boron trihalide and hydrolyzing the resultant product under acidic conditions is provided, and said process is useful in the synthesis of medicinals, pesticides and dyes.
本发明提供了一种在酚或苯胺的正交位上引入硫代羧酸酯的工艺,该工艺包括在三卤化硼存在下,使具有羟基或任选取代的氨基或环氨基(其中至少有一个正交位是空位)的苯基化合物与硫氰酸 C₁ - C₅ 烷基酯、硫氰酸 C₇ - C₁₃ 芳基酯或硫氰酸 C₆ - C₁₂ 芳基酯反应,并在酸性条件下水解生成物。