Concise route to defined stereoisomers of the hydroxy acid of the chondramides
摘要:
The use of Kobayashi vinylogous aldol reaction in the reaction with acetaldehyde led to anti-aldol product 11. After reductive removal of the chiral auxiliary, the primary alcohol was converted to the allyliodide 14. This compound could be engaged in an Evans alkylation reaction, leading eventually to hydroxy acid 19. Inclusion of a Mitsunobu inversion reaction on the sequence starting with ent-11 led to hydroxy ester 30, featuring a 6,7-syn-configuration. These hydroxy acids should help to elucidate the correct stereostructure of the chondramide depsipeptides. (C) 2008 Elsevier Ltd. All rights reserved.
The present invention provides novel chondramide derivatives of formula (I) which can be used for the treatment of cancer.
本发明提供了一种新型的化学式(I)的骨软骨素衍生物,可用于治疗癌症。
Total Synthesis and Configurational Assignment of Chondramide A
作者:Anke Schmauder、L. David Sibley、Martin E. Maier
DOI:10.1002/chem.200903500
日期:2010.4.12
3L), respectively. The synthesis of the 3‐amino‐2‐methoxy‐3‐arylpropanoic ester 20 b relied on an asymmetric dihydroxylation yielding diol ent‐15 a followed by a regioselective Mitsunobu substitution leading to 3‐azido‐2‐hydroxypropanoate 18 b. We could also show that the ester bond in the seco compound 26 b can be fashioned by a Mitsunobu esterification by using hydroxy ester (7S)‐7 and the tripeptide
Concise route to defined stereoisomers of the hydroxy acid of the chondramides
作者:Anke Schmauder、Sven Müller、Martin E. Maier
DOI:10.1016/j.tet.2008.04.109
日期:2008.6
The use of Kobayashi vinylogous aldol reaction in the reaction with acetaldehyde led to anti-aldol product 11. After reductive removal of the chiral auxiliary, the primary alcohol was converted to the allyliodide 14. This compound could be engaged in an Evans alkylation reaction, leading eventually to hydroxy acid 19. Inclusion of a Mitsunobu inversion reaction on the sequence starting with ent-11 led to hydroxy ester 30, featuring a 6,7-syn-configuration. These hydroxy acids should help to elucidate the correct stereostructure of the chondramide depsipeptides. (C) 2008 Elsevier Ltd. All rights reserved.