Stereoselecnve total synthesis of (±)-tetraponerine-8
摘要:
A stereocontrolled total synthesis of the ant alkaloid (+/-)-tetraponerine-8 (1) has been achieved in 7 steps and 28% overall yield, starting from 1-hydroxypiperidine. Key steps are a 1,3-dipolar cycloaddition (3 + 4 -> 5), a nucleophilic substitution (14 -> 15), and a reductive cyclization affording the tricyclic skeleton of tetraponerine-8 (15 -> 17).
Stereoselecnve total synthesis of (±)-tetraponerine-8
摘要:
A stereocontrolled total synthesis of the ant alkaloid (+/-)-tetraponerine-8 (1) has been achieved in 7 steps and 28% overall yield, starting from 1-hydroxypiperidine. Key steps are a 1,3-dipolar cycloaddition (3 + 4 -> 5), a nucleophilic substitution (14 -> 15), and a reductive cyclization affording the tricyclic skeleton of tetraponerine-8 (15 -> 17).
Stereoselective synthesis of (±)-tetraponerine-8, a defence alkaloid of the ant Tetraponera sp.
作者:P. Merlin、J.C. Braekman、D. Daloze
DOI:10.1016/s0040-4039(00)82019-5
日期:1988.1
The title compound has been stereoselectively synthesized in 6 steps.
标题化合物已通过6个步骤立体选择性地合成。
Protecting-Group-Directed Regio- and Stereoselective Oxymercuration–Demercuration: Synthesis of Piperidine Alkaloids Containing 1,2- and 1,3-Amino Alcohol Units
efficient synthesis of naturallyoccurring 1,2- and 1,3-amino alcohol unit containing 2-substituted piperidine alkaloids and their analogues has been developed from l-pipecolinic acid. The protocol describes the regio- and stereoselective oxymercuration–demercuration of 2-alkenyl piperidines based on protecting groups to give piperidine alkaloids as a key step. An efficient synthesis of naturally occurring
The cycloaddition of (Z) and (E)-vinyl sulfoxides with cyclic nitrones 1 and 2 is reported. Best diastereoselection is achieved with (Z)-vinyl sulfoxides 7a-d as dipolarophiles. This methodology allows the highly stereoselective synthesis of (+)-sedridine 9a, (-)-hygroline 10 and (-)-(2S)-N-carbomethoxypelletierine 11a. (C) 1997, Elsevier Science Ltd. All rights reserved.
MERLIN, P.;BRAEKMAN, J. C.;DALOZE, D., TETRAHEDRON LETT., 29,(1988) N 14, 1691-1694
作者:MERLIN, P.、BRAEKMAN, J. C.、DALOZE, D.
DOI:——
日期:——
Stereoselecnve total synthesis of (±)-tetraponerine-8
作者:P. Merlin、J.C. Braekman、D. Daloze
DOI:10.1016/s0040-4020(01)80905-4
日期:——
A stereocontrolled total synthesis of the ant alkaloid (+/-)-tetraponerine-8 (1) has been achieved in 7 steps and 28% overall yield, starting from 1-hydroxypiperidine. Key steps are a 1,3-dipolar cycloaddition (3 + 4 -> 5), a nucleophilic substitution (14 -> 15), and a reductive cyclization affording the tricyclic skeleton of tetraponerine-8 (15 -> 17).