NHC-Catalyzed Ring Expansion of Oxacycloalkane-2-carboxaldehydes: A Versatile Synthesis of Lactones
作者:Li Wang、Karen Thai、Michel Gravel
DOI:10.1021/ol8029005
日期:2009.2.19
Imidazolinium-derived carbenes catalyze the ring-expansion lactonization of oxacycloalkane-2-carboxaldehydes. A variety of functionalized five-, six-, and seven-memberedlactones can be formed efficiently under mild reaction conditions. The success of this new method for the construction of lactones is highly influenced by the electronic nature of the carbene catalyst.
LIQUID CRYSTAL COMPOUND AND LIQUID CRYSTAL COMPOSITION EMPLOYING THE SAME
申请人:DAXIN MATERIALS CORPORATION
公开号:US20160222295A1
公开(公告)日:2016-08-04
A liquid crystal compound and a composition employing the same are provided. The liquid crystal compound has a structure represented by Formula (I)
wherein R1, A1, A2, A3, A4, Z1, Z2, Z3, Z4, X, m, n, o, and p are defined as in the description.