专利号:US-2024383928-A1 优先权日:2021-07-30 标 题:Production of diorganotin dihalides 发明人:VINCENT ROBERT; ZIMMERMANN JARROD C 权利人:MERCK PATENT GMBH 摘要:The disclosed and claimed subject matter relates to the safe and efficient synthesis of diorganotin dihalide compounds of the formula R2SnX2 that as-synthesized are free of tetraalkyltin (R4Sn), trialkyltin halide (R3SnX) and monoalkyltin trihalide (RSnX3) species and of methods for their synthesis and use.
专利号:US-8329923-B2 优先权日:2010-06-17 标 题:4, 4′ disubstituted 4H-cyclopentadithiophene and new methods for synthesizing the same 发明人:VANDERZANDE DIRK; LUTSEN LAURENCE; VAN MIERLOO SARAH 权利人:VANDERZANDE DIRK; LUTSEN LAURENCE; VAN MIERLOO SARAH; IMEC; UNIV HASSELT 摘要:The present preferred embodiments relate to a method for the synthesis of a compound having the following general formula: n nthe method comprising the step of reacting, in presence of a diprotic acid having a negative pKa, a compound having the general formula:n n nwherein R 1 and R 2 are organic groups and wherein X and Y are independently selected from the group consisting of hydrogen, chloro, bromo, iodo, boronic acid, boronate esters, borane, pseudohalogen and organotin. It further relates to compounds so obtained and to compounds resulting from the ring closure of compound (II).
专利号:CN-115677790-B 优先权日:2021-07-23 标题 :Synthesis method of paeoniflorin derivative