Formal Allylation and Enantioselective Cyclopropanation of Donor/Acceptor Rhodium(II) Azavinyl Carbenes
作者:Zhili Liu、Lianfen Chen、Dong Zhu、Shifa Zhu
DOI:10.1021/acs.orglett.0c04251
日期:2021.2.19
es with alkenes under rhodium(II) catalysis is reported. Various allyl dihydronaphthalene derivatives were furnished via rhodium(II) azavinyl carbenes with moderate to good yields and excellent chemoselectivity. When monosubstituted alkenes are used, cyclopropanation occurs and good to excellent enantioselectivities have been achieved. Particularly noteworthy is the allylic C(sp2)–H activation instead
p-Isopropenylstyrene was synthesized and its polymerization characteristics are essentially the same as those of divinylbenzene. A soluble prepolymer can be separated from polymerization in a solvent having chain transfer properties but polymerization in bulk or in an inert solvent gives crosslinked infusible polymer.