86897-78-1Relevant articles and documents
ACID-INDUCED CYCLIZATION OF 3-BENZYL-3,4-DIHYDRO-2-PYRAZINONES: SYNTHESIS OF 1,2,3,4,5,6-HEXAHYDRO-1,5-IMINO-3-BENZAZOCINE DERIVATIVES
Kurihara, Hideshi,Mishima, Hiroshi
, p. 191 - 199 (2007/10/02)
3,4-Dihydro-4-ethoxycarbonyl-2-pyrazinones (3), which can be prepared by cyclization of dipeptide aldehyde acetals (2) in the presence of catalytic amount of proton acid, were shown to be useful intermediates for the preparation of complex heterocycles by