Routes for the selective synthesis of 1-, or 2-substituted hydrazides, and 1,2-disubstituted hydrazides are reported. These routes proceed via cyanoborohydride reduction of stable acyl hydrazone intermediates.
Synthesis of phthalazinones via palladium(ii)-catalysed intramolecular oxidative C–H/C–H cross-coupling of N′-methylenebenzohydrazides
作者:Takanori Matsuda、Yuki Tomaru、Yoshiya Matsuda
DOI:10.1039/c3ob40195b
日期:——
A palladium(II)-catalysed intramolecular oxidative C–H/C–H cross-coupling of N′-methylenebenzohydrazides to phthalazin-1(2H)-ones has been developed. This cyclization is believed to mechanistically proceed via electrophilic ortho-palladation and subsequent C-arylation of the carbon–nitrogen double bond.