Synthesis of [1.1.1]Propellanes by Bridging of Bicyclo[1.1.0]butanes
作者:Markus Werner、David S. Stephenson、Günter Szeimies
DOI:10.1002/jlac.199619961103
日期:1996.11
Several [1.1.1]propellanes were synthesized by bridging the 1,3-positions of the corresponding bicyclo[1.1.0]butane. The synthesis of 1-bromo-3-(chloromethyl)bicyclobutanes and the bridging were carried out in a one-pot reaction by addition of 2.0 equiv. of MeLi to 1,1-dibromo-2,2-bis(chlormethyl)-cyclopropanes 10. Three routes to 10 were investigated: Firstly, the Wittig reaction of 1,3-dichloroacetone
Continuous Synthesis Method for 1, 1'-Bicyclic [1.1.1]Pentane-1,3-Diethyl Ketone Compounds
申请人:JILIN ASYMCHEM LABORATORIES CO., LTD.
公开号:US20220144744A1
公开(公告)日:2022-05-12
Provided is a continuous synthesis method for 1,1′-bicyclic[1.1.1]pentane-1,3-diethyl ketone compounds. The continuous synthesis method comprises: under the irradiation of a light source, continuously conveying raw material A and raw material B to a continuous reaction device for a continuous photochemical reaction to obtain 1,1′-bicyclic[1.1.1]pentane-1,3-diethyl ketone compounds, and controlling the reaction temperature in the continuous reaction device by a temperature control device during the continuous photochemical reaction. A propellane with substituents, as a reaction raw material, is subjected to the above photochemical reaction in the continuous reaction device to reduce the probability of its slow decomposition and deterioration under the irradiation, and greatly improve the conversion rate of the reaction material and product yield.