Synthesis of 3-spiroannulated hexahydro-6,8a-epoxyisoquinolines
摘要:
The title compounds were synthesised by the intramolecular [4+2]-cycloaddition of 1-N-furfurylarnino-1-allylcyclanes in the presence of acetic anhydride.
Intramolecular Diels—Alder reaction of 4-(N-furfuryl)aminobut-1-enes. New approach to the synthesis of 6,8a-epoxyoctahydroisoquinoline (3-aza-11-oxatricyclo[6.2.1.0<sup>1,6</sup>]undec-9-ene) derivatives
作者:F. I. Zubkov、E. V. Nikitina、K. F. Turchin、A. A. Safronova、R. S. Borisov、A. V. Varlamov
DOI:10.1023/b:rucb.0000037856.61928.c4
日期:2004.4
The intramolecularDiels—Alder reaction of readily accessible 4-substituted 4-(N-furfuryl)aminobut-1-enes was studied and a new one-step method was developed for the synthesis of 6,8a-epoxy-1,2,3,4,4a,5,6,8a-octahydroisoquinoline (3-aza-11-oxatricyclo[6.2.1.01,6]undec-9-ene) derivatives. The [4+2]-cycloaddition proceeds stereoselectively to form exo-adducts. The influence of substituents at the nitrogen