Tandem hydroformylation–hydrazone formation–Fischer indole synthesis: a novel approach to tryptamides
作者:Axel M. Schmidt、Peter Eilbracht
DOI:10.1039/b503396a
日期:——
A novelone-potsynthesis of indole systems via tandem hydroformylation-hydrazone formation-Fischer indolization starting from allylic amides and aryl hydrazines is described. This tandem procedure directly leads to biologically interesting tryptamides and analogues.
Hydrolyticdeallylation of N-allyl amides to give amides and propanal can be achieved with PdII catalysts. The optimized catalyst consists of Pd(OCOCF3)2 and 1,3-bis(diphenylphosphanyl)propane (DPPP). Several kinds of open-chain N-allyl amides and N-allyl lactams undergo hydrolyticdeallylation to give the corresponding amides and lactams in good to high yield. A mechanism which includes isomerization