TRIFONOV, LATCHEZAR S.;ORAHOVATS, ALEXANDER S., HELV. CHIM. ACTA, 70,(1987) N 7, 1732-1736
作者:TRIFONOV, LATCHEZAR S.、ORAHOVATS, ALEXANDER S.
DOI:——
日期:——
Synthesis of 1,2-five-ring-annellated barrelenesvia the intramolecularDiels-Alder reaction of acetylenic derivatives
作者:Latchezar S. Trifonov、Alexander S. Orahovats
DOI:10.1002/hlca.19870700708
日期:1987.11.4
The intramolecularDiels-Alderreaction conducted with acetylenic acylureas, obtained from carbodiimides, and the acetylenic acid 5 and its derivatives 13 gave the 1,2-annellated barrelene 14 (from 13a) and the benzobarrelenes 8 (from 5) and 15 (from 13b); in the case of 3-butynoic acid (1),[1,3]-H shift were observed. The formation of the azabarrelenes 16 (from 13c) as an intermediate is postulated