Vinyl Imidates in Cycloaddition Reactions: A Formal Synthesis of (±)-Reserpine
作者:Steven M. Sparks、Kenneth J. Shea
DOI:10.1021/ol015988w
日期:2001.7.1
[reaction: see text] The intramolecular Diels-Alder reaction of N-acylvinylimidates provides an efficient entry into cis-fused perhydroisoquinoline ring systems. This is demonstrated by the preparation of isoquinoline 2, an intermediate, which has been previously transformed to reserpine.
The intramolecular Diels-Alder cycloaddition of N-dienoyl acrylimidates. New methodology for the construction of nitrogen heterocycles.
作者:K.J. Shea、J.J. Svoboda
DOI:10.1016/s0040-4039(00)85076-5
日期:1986.1
N-(3,5-Hexadienoyl)-acrylimidates, which have been synthesized by acylation of 2-ethoxy-1-aza-1,3-butadienes with 3,5-hexadienoyl chloride, are found to undergo facile Intramolecular Diels-Alder cycloadditions to afford predominately cis-hexahydroisoquinolines in good yields.
Vinyl imidates in cycloaddition reactions: synthesis of (±)-alloyohimbane
作者:Steven M. Sparks、Kenneth J. Shea
DOI:10.1016/s0040-4039(00)01093-5
日期:2000.8
The intramolecularDiels–Alderreaction of N-acylvinyl imidates provides a rapid entry into cis-fused hexahydroisoquinolones. This methodology has been used in a concise synthesis of the yohimbine alkaloid (±)-alloyohimbane.
The intramolecular Diels-Alder cycloaddition of N-dienoyl acrylimidates. An efficient approach for the synthesis of hexahydroisoquinolones and hexahydroisoindolones
作者:Arnold J. Gutierrez、Kenneth J. Shea、John J. Svoboda
DOI:10.1021/jo00279a021
日期:1989.9
SHEA K. J.; SVOBODA J. J., TETRAHEDRON LETT., 27,(1986) N 40, 4837-4840