Unusual [3+1] Cycloaddition of a Stable Silylene with a 2,3-Diazabuta-1,3-diene versus [4+1] Cycloaddition toward a Buta-1,3-diene
作者:Yun Xiong、Shenglai Yao、Matthias Driess
DOI:10.1021/om901034w
日期:2010.2.22
N-heterocyclic silylene LSi: 1 L = CH[(C═CH2)CMe][N(Ar)]2], Ar = 2,6-iPr2C6H3} with acetone azine (1,1,4,4-tetramethyl-2,3-diazabuta-1,3-diene) and buta-1,3-diene derivatives have been probed. Unexpectedly, acetone azine undergoes a unique [3+1] cycloaddition to give the 1-sila-2,3-diazacyclobutane 2 and its 1-sila-2,3-diazacyclobutane isomer 3. The latter rearranges further to decrease ring strain,