Synthetic studies towards furosesquiterpenes: Construction of linearly-fused trans- and cis-furo[3,2-b]-and furo[2,3-b] decalins
摘要:
Linearly fused furo[2.3-b]- and furo[3,2-b] decalin systems with cis trans ring junctions are present in several furosesquiterpenes obtained from marine sponges. A short and efficient synthesis of this ring system is described starting from Hageman's ester (1). The method has been extended for the synthesis of compound 8 and 14 via the diketones 5,6 and 12 respectively. (C) 1997 Published by Elsevier Science Ltd.
Synthetic studies towards furosesquiterpenes: Construction of linearly-fused trans- and cis-furo[3,2-b]-and furo[2,3-b] decalins
摘要:
Linearly fused furo[2.3-b]- and furo[3,2-b] decalin systems with cis trans ring junctions are present in several furosesquiterpenes obtained from marine sponges. A short and efficient synthesis of this ring system is described starting from Hageman's ester (1). The method has been extended for the synthesis of compound 8 and 14 via the diketones 5,6 and 12 respectively. (C) 1997 Published by Elsevier Science Ltd.
Synthesis of Novel Heterocyclic Structures via Reaction of Isocyanides with <i>S-trans</i>-Enones
作者:Jeffrey D. Winkler、Sylvie M. Asselin
DOI:10.1021/ol061451c
日期:2006.8.1
The reaction of enone 1, bearing an internal nucleophilic moiety, i.e., furan or pyrrole ( X = O, NR'), with isocyanides is presented. The formation of products resulting from the reaction of the zwitterionic intermediate 2 with a second equivalent of isocyanide prior to cyclization to give 3, as well as the direct formation of 4 from 2, is described.
Synthetic studies towards furosesquiterpenes: Construction of linearly-fused trans- and cis-furo[3,2-b]-and furo[2,3-b] decalins
作者:Arindam Chakraborty、Gandhi K. Kar、Jayanta K. Ray
DOI:10.1016/s0040-4020(97)00053-7
日期:1997.2
Linearly fused furo[2.3-b]- and furo[3,2-b] decalin systems with cis trans ring junctions are present in several furosesquiterpenes obtained from marine sponges. A short and efficient synthesis of this ring system is described starting from Hageman's ester (1). The method has been extended for the synthesis of compound 8 and 14 via the diketones 5,6 and 12 respectively. (C) 1997 Published by Elsevier Science Ltd.