Substitution of the acetoxy groups of dialkoxymethylacetates by organometallic reagents: a route to allyl-, propargyl-, homoallyl-, homopropargyl- and α-stannylacetals
The substitution of the acetoxy groups of dialkoxymethylacetates by organometallicreagents has been examined in a search for new methods of preparing functional acetals. The efficiency of the substitution of the acetoxy group is highly dependent on the nature of the organometallicreagents: soft nucleophiles with strong electrophilic assistance by the counterion are the best reagents. Allyl-, propargyl-
Using improved reaction protocols for three-component coupling reactions of aldehydes, dienophiles, and amides (AAD-reaction) or anhydrides (ANAD-reaction) or orthoesters (ALAD-reaction), a variety of functionalized hexahydroisoindolo derivatives were synthesized and fully characterized. Condensation of ubiquitous available aldehydes with unsaturated amides or anhydrides or orthoesters and subsequent Diels-Alder reactions with electron deficient dienophiles furnishes endo-selective enyne-reaction precursors in good to excellent yield. (c) 2005 Elsevier Ltd. All rights reserved.
Voronkov, M. G.; Dubinskaya, E. I.; Tsyrendorzhieva, I. P., Journal of applied chemistry of the USSR, 1992, vol. 65, # 12.2, p. 2310 - 2314
作者:Voronkov, M. G.、Dubinskaya, E. I.、Tsyrendorzhieva, I. P.、Legov, G. N.、Stankevich, O. S.、et al.
DOI:——
日期:——
Woronkow M. G., Dubinskaja E. I., Chyrendorzhiewa I. P., Legow G. N., Sta+, Zh. prikl. khimii, 65 (1992) N 12, S 2775-2779
作者:Woronkow M. G., Dubinskaja E. I., Chyrendorzhiewa I. P., Legow G. N., Sta+