Spiroannulated Nucleosides and Process for the Preparation Thereof
申请人:Chepuri Venkata Ramana
公开号:US20130289266A1
公开(公告)日:2013-10-31
We claim a simple strategy for the synthesis of a collection of C(3′)-spirodihydroisobenzo- furannulated and C(3′)-spirodihydroisobenzo-furannulated nucleosides featuring a [2+2+2]-cyclotrimerization as the key reaction. The cyclotrimerization reactions are facile with the unprotected nucleosides having a diyne unit. When both alkynes of the diyne are terminal, the regioselectivity is poor. However, when one of the terminal alkynes is additionally substituted, the cyclotrimerizations are highly diaste reoselective. Since the key bicycloannulation is the final step, this strategy provides flexibility in terms of the alkynes and is thus amenable for the synthesis of a focussed small molecule library.
[EN] SPIROANNULATED NUCLEOSIDES AND PROCESS FOR THE PREPARATION THEREOF<br/>[FR] NUCLÉOSIDES SPIROANNELÉS ET LEUR PROCÉDÉ DE PRÉPARATION ASSOCIÉ
申请人:COUNCIL SCIENT IND RES
公开号:WO2012090155A1
公开(公告)日:2012-07-05
We claim a simple strategy for the synthesis of a collection of C(3')-spirodihydroisobenzo- furannulated and C(3')-spirodihydroisobenzo-furannulated nucleosides featuring a [2+2+2]- cyclotrimerization as the key reaction. The cyclotrimerization reactions are facile with the unprotected nucleosides having a diyne unit. When both alkynes of the diyne are terminal, the regioselectivity is poor. However, when one of the terminal alkynes is additionally substituted, the cyclotrimerizations are highly diastereoselective. Since the key bicycloannulation is the final step, this strategy provides flexibility in terms of the alkynes and is thus amenable for the synthesis of a focussed small molecule library.
Target cum flexibility: synthesis of C(3′)-spiroannulated nucleosides
作者:Mangesh P. Dushing、C.V. Ramana
DOI:10.1016/j.tetlet.2011.06.100
日期:2011.9
report a simple strategy for the synthesis of a collection of C(3′)-spirodihydroisobenzo-furannulated nucleosides featuring a [2+2+2]-cyclotrimerization as the key reaction. The cyclotrimerization reactions are facile with the unprotected nucleosides having a diyne unit. When both alkynes of the diyne are terminal, the regioselectivity is poor. However, when one of the terminal alkynes is additionally