Synthesis and Evaluation of Tryprostatin B and Demethoxyfumitremorgin C Analogues
摘要:
Tryprostatin B and demethoxyfumitremorgin C are fungal inhibitors of mammalian cell cycle progression at the G(2)/M transition. N-Alkyl derivatives of the L-TrP-L-Pro diketopiperazine were prepared as analogues of tryprostatin B, and two of these were more active than the natural product. A second series of cis- and trans-tetrahydro-beta-carbolines annulated to a diketopiperazine were prepared as analogues of demethoxyfumitremorgin C. The nature of the alkyl substituent, as well as its cis or trans relationship in the tetrahydro-beta-carboline ring, was found to have a significant effect on cytotoxic activity. Small cis-alkyl substituents fall into the demethoxyfumitremorgin C family, whereas bulky benzyl trans compounds appear to act via a different mechanism of action.
Enantioselective Synthesis and Antimicrobial Activities of Tetrahydro-<i>Β</i>
-Carboline Diketopiperazines
作者:Yangmin Ma、Hao Wu、Jin Zhang、Yanchao Li
DOI:10.1002/chir.22193
日期:2013.10
A series of single isomers tetrahydro‐β‐carboline diketopiperazines were stereoselectively synthesized starting from l‐tryptophan methyl ester hydrochloride and six aldehydes through a four‐step reaction including Pictet‐Spengler reaction, crystallization‐induced asymmetric transformations (CIAT), Schotten‐Baumann reaction, and intramolecular ester amidation. The chemical structures were characterized