Bimane cyclic esters, possible stereologues of trypanothione as antitrypanosomal agents. Bimanes 29
摘要:
Tricyclic esters derived from bimanes have been synthesized with ring sizes near or equal to that of trypanothione disulfide (T(S)(2)), a bis-glutathionylspermidine that is involved in regulating the thiol status of Leishmania and other trypanosomatids. Modest activity for many of the compounds against Leishmania donovani with a maximum at the T(S)(2) ring size suggests that the esters act as T(S)(2) surrogates. However, no inhibition of T(S)(2)-reductase is observed for a number of the compounds. A series of tricyclic bimane amides with structures more closely analogous to T(S)2 are inactive in biological tests, New approaches were developed for the synthesis of the amides. The surprising effectiveness of the cyclic ester synthesis is explained. Acid chloride formation catalyzed by sulfides is briefly described.
DOI:
10.1016/0223-5234(96)88283-3
作为产物:
描述:
3,5-双溴甲基-2,6-二甲基吡唑并[1,2-a]吡唑-1,7-二酮 、 Boc-glycine potassium salt 以
乙腈 为溶剂,
以66.8%的产率得到N-t-butoxycarbonyl-glycyl diester of 4,6-hydroxymethyl-3,7-dimethyl-1,5-diazabicyclo<3.3.0>octa-3,6-diene-2,8-dione
参考文献:
名称:
Bimane cyclic esters, possible stereologues of trypanothione as antitrypanosomal agents. Bimanes 29
摘要:
Tricyclic esters derived from bimanes have been synthesized with ring sizes near or equal to that of trypanothione disulfide (T(S)(2)), a bis-glutathionylspermidine that is involved in regulating the thiol status of Leishmania and other trypanosomatids. Modest activity for many of the compounds against Leishmania donovani with a maximum at the T(S)(2) ring size suggests that the esters act as T(S)(2) surrogates. However, no inhibition of T(S)(2)-reductase is observed for a number of the compounds. A series of tricyclic bimane amides with structures more closely analogous to T(S)2 are inactive in biological tests, New approaches were developed for the synthesis of the amides. The surprising effectiveness of the cyclic ester synthesis is explained. Acid chloride formation catalyzed by sulfides is briefly described.
Tricyclic esters derived from bimanes have been synthesized with ring sizes near or equal to that of trypanothione disulfide (T(S)(2)), a bis-glutathionylspermidine that is involved in regulating the thiol status of Leishmania and other trypanosomatids. Modest activity for many of the compounds against Leishmania donovani with a maximum at the T(S)(2) ring size suggests that the esters act as T(S)(2) surrogates. However, no inhibition of T(S)(2)-reductase is observed for a number of the compounds. A series of tricyclic bimane amides with structures more closely analogous to T(S)2 are inactive in biological tests, New approaches were developed for the synthesis of the amides. The surprising effectiveness of the cyclic ester synthesis is explained. Acid chloride formation catalyzed by sulfides is briefly described.