Bridged Organosilane and Production Method Thereof
申请人:Shimada Toyoshi
公开号:US20090054649A1
公开(公告)日:2009-02-26
Provided is a bridged organosilane, which has a large complex organic group, and which is useful in the synthesis of a mesoporous silica and a light-emitting material, and a production method of the bridged organosilane. The bridged organosilane is expressed by the following general formula (1):
[in the formula (1), q represents an integer in a range from 2 to 4, X
1
— represents a substituent selected from the group consisting of substituents expressed by the following general formulae (2) to (5):
(in the formulae (2) to (5), R
1
represents alkyl group having 1 to 5 carbon atoms, R
2
represents an allyl group, and n represents an integer in a range from 0 to 3, and m represents an integer in a range from 0 to 6), and A
1
represents an organic group expressed by, for example, the following general formula (6):
(in the formula (6), Y
1
< represents a substituent expressed by, for example, O═C<)].
A useful procedure for diiodination of carbazoles and subsequent efficient transformation to novel 3,6-bis(triethoxysilyl)carbazoles giving mesoporous materials
Bis(pyridine)iodoniumtetrafluoroborate (IPy2BF4) was successfully used as a diiodination reagent for carbazole and its derivatives to give 3,6-diiodocarbazoles in excellent yield. Subsequent rhodium-catalyzed disilylation of 3,6-diiodocarbazoles with triethoxysilane gave the corresponding 3,6-bis(triethoxysilyl)carbazoles, which are precursors for sol–gel polymerization, in good yield.