申请人:Sumitomo Chemical Company, Limited
公开号:EP3162795A1
公开(公告)日:2017-05-03
A compound represented by formula (7) or a salt thereof can be manufactured by the following steps:
a step of allowing a compound represented by formula (1-S) :
(wherein R1 represents a C1-8 straight-chain alkyl group, and X represents a halogen atom)
to react with a compound represented by formula (2) :
R2SM2 (2)
(wherein R2 represents a C1-8 straight-chain alkyl group, and M2 represents a hydrogen atom or an alkali metal) to give a compound represented by formula (3-S) :
(wherein R1, R2, and X are as defined above);
a step of allowing the compound represented by formula (3-S) to react with hydrogen peroxide in the presence of a tungsten catalyst and an acid to give a compound represented by formula (6-S) or a salt thereof:
(wherein X and R2 are as defined above); and
a step of reducing the compound represented by formula (6-S) or salt thereof in the presence of a base and a heterogeneous transition metal catalyst to give a compound represented by formula (7) or a salt thereof:
(wherein R2 is as defined above).
式(7)代表的化合物或其盐可以通过以下步骤制造:
允许式(1-S)代表的化合物......的步骤:
(其中 R1 代表 C1-8 直链烷基,X 代表卤素原子)
与式 (2) 所代表的化合物反应:
R2SM2 (2)
(其中 R2 代表 C1-8 直链烷基,M2 代表氢原子或碱金属)反应,得到式(3-S)代表的化合物:
(其中 R1、R2 和 X 如上定义);
让式 (3-S) 所代表的化合物在钨催化剂和酸的存在下与过氧化氢反应,得到式 (6-S) 所代表的化合物或其盐:
(其中 X 和 R2 如上文所定义);以及
在碱和异相过渡金属催化剂存在下还原式 (6-S) 所代表的化合物或其盐,得到式 (7) 所代表的化合物或其盐:
(其中 R2 如上定义)。