Copper-Catalyzed Vinylation of Hydrazides. A Regioselective Entry to Highly Substituted Pyrroles
摘要:
A modular route to highly substituted pyrroles has been developed. This transformation consists of two sequential copper-catalyzed vinylations of bis-Boc-hydrazine followed by thermal rearrangement/cyclization. A wide variety of functionalized pyrroles can be prepared in a selective manner from simple and easily accessible precursors.
Hexafluoroisopropanol as a Unique Solvent for Stereoselective Iododesilylation of Vinylsilanes
摘要:
Stereoselective preparation of iodoalkenes from vinylsilanes is described. 1,1,1,3,3,3-HexafluoroisopropanoI serves as a unique solvent that ensures high yields and stereoselectivities in the lododesilylation of a variety of functionalized substrates.