139452-53-2Relevant articles and documents
Tetrahydropyridine (THP) ring expansion under the action of activated terminal alkynes. The first synthesis and X-ray crystal structure of tetrahydropyrimido[4,5-d]azocines
Voskressensky, Leonid G.,Borisova, Tatiana N.,Kostenev, Innokenti S.,Kulikova, Larisa N.,Varlamov, Alexey V.
, p. 999 - 1001 (2006)
Tetrahydropyridopyrimidines (THPPm) 1-3 underwent tandem cleavage-cyclization piperidine ring enlargement under the action of terminal activated alkynes to produce tetrahydropyrimido[4,5-d]azocines 4-7 in good preparative yields. The latter compounds are representatives of a new heterocyclic system.
Dehydrogenation of 6-Azaquinazoline Derivatives. Formation of Unexpected Quinonediimine Intermediates
Huber, Imre,Fueloep, Ferenc,Lazar, Janos,Bernath, Gabor,Toth, Gabor
, p. 157 - 162 (2007/10/02)
2,6-Disubstituted 5,6,7,8-tetrahydropyridopyrimidin-4(3H)-one (6-azaquinazoline) derivatives 7a-e were synthesized from N-substituted 3-methoxycarbonyl-4-piperidones 5a, b and amidines 6a-c.Compounds 7a-d and the debenzylated derivatives 8a-c under