Synthesis and tubulin-binding properties of new allocolchicinoids
摘要:
Allocolchicinoids with B- and C-ring variations were synthesized using sequential enyne-metathesis/Diets-Alder reactions (A -> AB -> ABC approach) and evaluated for their inhibitory effect on tubulin assembly in vitro. (-)-Allocolchicine 11 with methyl ester at C10 and (+/-)-cyclopropyl allocolchicinoid 32 exhibit similar activity than (-)-colchicine (1), probably derived from a similar flexibility in the biphenyl system. The presence of methyl ester at C10 led to a little loss in potency in comparison with the series with methyl ester at C9. A complete loss of activity was observed for allocolchicine 9 with methyl ester at C11. (C) 2010 Elsevier Inc. All rights reserved.
Synthesis of New Allocolchicinoids with Seven- and Eight-Membered B-Rings by Enyne Ring-Closing Metathesis
作者:François-Didier Boyer、Issam Hanna
DOI:10.1002/ejoc.200800595
日期:2008.10
functionality in the C-ring at the C10 or C11 positions, is reported. An asymmetric synthesis of (7S)-allocolchicine 5 is also described. The main features included the elaboration of a common intermediate, the AB bicyclic ring system, in which the construction of the seven-membered ring was achieved by an enyne ring-closingmetathesis (RCM) reaction. A subsequent Diels–Alder/aromatization sequence afforded the
Synthesis of Allocolchicines Using Sequential Ring-Closing Enyne Metathesis−Diels−Alder Reactions
作者:François-Didier Boyer、Issam Hanna
DOI:10.1021/ol0630548
日期:2007.2.1
New allocolchinoids having functionality in the C ring at position C10 or C11 have been synthesized using the enyne ring-closing metathesis (RCM) reaction for construction of the seven-membered ring and a Diels-Alder-aromatization sequence for the elaboration of the aromatic ring C. [reaction: see text].
Synthesis and tubulin-binding properties of new allocolchicinoids
作者:François-Didier Boyer、Joëlle Dubois、Sylviane Thoret、Marie-Elise Tran Huu Dau、Issam Hanna
DOI:10.1016/j.bioorg.2010.03.003
日期:2010.8
Allocolchicinoids with B- and C-ring variations were synthesized using sequential enyne-metathesis/Diets-Alder reactions (A -> AB -> ABC approach) and evaluated for their inhibitory effect on tubulin assembly in vitro. (-)-Allocolchicine 11 with methyl ester at C10 and (+/-)-cyclopropyl allocolchicinoid 32 exhibit similar activity than (-)-colchicine (1), probably derived from a similar flexibility in the biphenyl system. The presence of methyl ester at C10 led to a little loss in potency in comparison with the series with methyl ester at C9. A complete loss of activity was observed for allocolchicine 9 with methyl ester at C11. (C) 2010 Elsevier Inc. All rights reserved.