resonance and supported by quantum chemical calculations. The dihydropyridine ring in each of the compounds exists in flattened boat-type conformation. The observed ring distortions around the C(4) and N(1) atoms are interrelated. The substituent at N(1) has great influence on nitrogen atom pyramidality. The 1H, 13C and 15NNMRchemicalshifts and couplingconstants are discussed in terms of their relationship
Réactions de l'acide diméthyl-2,6 diacétyl-3,5 dihydro-1,4 pyridine et d'un analogue
作者:J.F. Biellmann、M.P. Goeldner
DOI:10.1016/s0040-4020(01)98043-3
日期:1971.1
α-C–H functionalization of glycine derivatives under mechanochemical accelerated aging en route the synthesis of 1,4-dihydropyridines and α-substituted glycine esters
underexploited in organic synthesis and medicinal chemistry. We report the first mechanochemical accelerated aging strategy for solvent-minimal (cascade) cross dehydrogenative coupling (CDC) reactions between glycine esters/amides and a range of nucleophiles, which features clean and convenient setup, ambient temperature, atmospheric oxidation, and feasibility, for multigram-scale synthesis. By virtue of these