Intramolecular Prins Reaction and Catalysts Suitable Therefor
申请人:Nobis Markus
公开号:US20090093649A1
公开(公告)日:2009-04-09
The present invention relates to a process for the preparation of a compound of the formula B having the following steps: provision of a compound of the formula A intramolecular reaction of the compound of the formula A in the presence of an aluminium siloxide of the formula (Ia) or (Ib).
Intramolecular Prins reaction and catalysts suitable therefor
申请人:Symrise GmbH & Co. KG
公开号:US07915457B2
公开(公告)日:2011-03-29
The present invention relates to a process for the preparation of a compound of the formula B having the following steps: provision of a compound of the formula A intramolecular reaction of the compound of the formula A in the presence of an aluminium siloxide of the formula (Ia) or (Ib).
The first electrochemical hydrolysis of hydrosilanes to silanols under mild and neutral reaction conditions is reported. The practical protocol employs commercially available and cheap NHPI as a hydrogen‐atom transfer (HAT) mediator and operates at room temperature with high selectivity, leading to various valuable silanols in moderate to good yields. Notably, this electrochemical method exhibits a