The regioselective bromine-lithium exchange reaction of alkoxymethyldibromobenzene: A new strategy for the synthesis of tofogliflozin as a SGLT2 inhibitor for the treatment of diabetes
摘要:
The regioselective bromine-lithium exchange reaction of 2,4-dibromo-1-(1-methoxy-1methylethoxymethyl)benzene (2), which resulted in optimized selectivity of 220:1, is described. Applying this method to the synthesis of tofogliflozin (1) as a SGLT2 inhibitor is also described. Selective and sequential metalation-functionalization of 2 led to the synthesis of 1 in 47% overall yield. (C) 2016 Elsevier Ltd. All rights reserved.
CRYSTAL OF SPIROKETAL DERIVATIVES AND PROCESS FOR PREPARATION OF SPIROKETAL DERIVATIVES
申请人:Murakata Masatoshi
公开号:US20110306778A1
公开(公告)日:2011-12-15
The present invention provides a process for preparing a spiroketal derivative, via an intermediate represented by Formula (VI):
wherein variable groups and numbers are as defined in the specification, which can be produced from dihalobenzene derivatives in one pot reaction.
CRYSTAL OF SPIROKETAL DERIVATIVE, AND PROCESS FOR PRODUCTION THEREOF
申请人:Chugai Seiyaku Kabushiki Kaisha
公开号:EP2308886A1
公开(公告)日:2011-04-13
The present invention provides a process for preparing a spiroketal derivative, via an intermediate represented by Formula (VI):
wherein variable groups and numbers are as defined in the specification, which can be produced from dihalobenzene derivatives in one pot reaction.
CRYSTALLINE FORMS OF (1S,3'R,4'S,5'S,6'R)-6-[(4-ETHYLPHENYL)METHYL]-3',4',5',6'-TETRAHYDRO-6'- (HYDROXYMETHYL)SPIRO[ISOBENZOFURAN-1(3H) 2'-[2H]PYRAN]-3',4',5'-TRIOL
申请人:Chugai Seiyaku Kabushiki Kaisha
公开号:EP3170834A1
公开(公告)日:2017-05-24
The present invention relates to crystalline forms of the compound represented by Formula (XI), which is useful for preventing or treating diabetes.
本发明涉及由式(XI)代表的化合物的结晶形式,它可用于预防或治疗糖尿病。
PROCESS FOR THE PRODUCTION OF A SPIROKETAL DERIVATIVE
申请人:Chugai Seiyaku Kabushiki Kaisha
公开号:EP2308886B1
公开(公告)日:2016-12-07
CRYSTALLINE FORMS OF (1S,3'R,4'S,5'S,6'R)-6-[(4-ETHYLPHENYL)METHYL]-3',4',5',6'-TETRAHYDRO-6'-(HYDROXYMETHYL)SPIRO[ISOBENZOFURAN-1(3H) 2'-[2H]PYRAN]-3',4',5'-TRIOL