Synthesis and reactivity of an efficient 1,2-dehydrocarborane precursor, phenyl[o-(trimethylsilyl)carboranyl]iodonium acetate
作者:Joonsang Jeon、Tsugio Kitamura、Byung-Woo Yoo、Sang Ook Kang、Jaejung Ko
DOI:10.1039/b107343e
日期:2001.10.11
The reaction of [o-(trimethylsilyl)carboranyl]lithium with IPh(OAc)2 in diethyl ether affords an efficient 1,2-dehydro-o-carborane precursor 4: the facile 2 + 4 cycloaddition of 4 with dienes in the presence of the desilylating agent is reported.
作者:Tirthankar Ghosh、Henry L. Gingrich、Carolyn K. Kam、Edward C. Mobraaten、Maitland Jones
DOI:10.1021/ja00004a036
日期:1991.2
A carborane version of dehydrobenzene, 1,2-dehydro-o-carborane, has been generated from (2-bromo-o-carboranyl) lithium. This new intermediate undergoes the ene reaction as well as 2+2 and 2+4 cycloadditions. The 2+2 cycloaddition is nonstereospecific, whereas the 2+4 cycloaddition likely proceeds with retention of stereochemistry