The role of entropic and electronic factors in controlling homo-1,4 addition of dihalocarbenes to norbornadiene-type molecules
作者:Charles W. Jefford、Viktor delos Heros、Jean-Claude E. Gehret、Georges Wipff
DOI:10.1016/s0040-4039(00)77771-9
日期:1980.1
The proportion of 1,2 and homo-1,4 adducts obtained from the reaction of difluoro-carbene with norbornadiene and its 7-oxa, 7-methyl, and 7,7-difluoro derivatives is reflected by the calculated energies of the frontier molecular orbitals of the dienes. It appears that the product composition is dictated by competing 1,2 electrophilic and homo-1,4 nucleophilic cheletropic reactions.
Universal building blocks and support media for synthesis of oligonucleotides and their analogs
申请人:——
公开号:US20040152905A1
公开(公告)日:2004-08-05
Compounds for the synthesis of oligomeric compounds, particularly oligonucleotides and chemically modified oligonucleotide analogs, are provided. In addition, methods for functionalization of a support medium with a first monomeric subunit and methods for the synthesis of oligomeric compounds utilizing the novel compounds bound to support media are provided.