Pyrimidinylpropenamides as antitumor agents. Analogs of the antibiotic sparsomycin
摘要:
A series of pyrimidinylpropenamides 9 and their oxidation products 10 was prepared, as analogues of sparsomycin (1), for antitumor evaluation. Syntheses involved condensation of the appropriate amino alcohol 5 with acid 8. The resulting sulfides 9 were then oxidized with NaIO4 or H2O2 to sulfoxides 10. Activity was studied in lymphocytic leukemia P-338 and KB cell culture. With the exception of the n-decyl analogue, all of the deoxygenated compounds 9 were inactive regardless of the stereochemical form. In the sulfoxide series 10, those compounds prepared with an L configuration at the asymmetric carbon were also inactive. The completely racemic sulfoxides, on the other hand, displayed substantial antitumor activity (ILS = 37-61% in P-388; ED50 = 1.2-2.4 mug/ml in KB) suggesting that both the presence of a sulfoxide moiety and a D configuration at the chiral carbon atom were structural requirements for a positive antitumor response. There appeared to be a large tolerance for the group substituted at the sulfoxide moiety, however.
Pyrimidinylpropenamides as antitumor agents. Analogs of the antibiotic sparsomycin
作者:Chie-Chang L. Lin、Ronald J. Dubois
DOI:10.1021/jm00213a004
日期:1977.3
A series of pyrimidinylpropenamides 9 and their oxidation products 10 was prepared, as analogues of sparsomycin (1), for antitumor evaluation. Syntheses involved condensation of the appropriate amino alcohol 5 with acid 8. The resulting sulfides 9 were then oxidized with NaIO4 or H2O2 to sulfoxides 10. Activity was studied in lymphocytic leukemia P-338 and KB cell culture. With the exception of the n-decyl analogue, all of the deoxygenated compounds 9 were inactive regardless of the stereochemical form. In the sulfoxide series 10, those compounds prepared with an L configuration at the asymmetric carbon were also inactive. The completely racemic sulfoxides, on the other hand, displayed substantial antitumor activity (ILS = 37-61% in P-388; ED50 = 1.2-2.4 mug/ml in KB) suggesting that both the presence of a sulfoxide moiety and a D configuration at the chiral carbon atom were structural requirements for a positive antitumor response. There appeared to be a large tolerance for the group substituted at the sulfoxide moiety, however.
New Chiral Catalysts ContainingN,O-Heterocycles Derived from Chiral Amino Alcohols
作者:Olga Juanes、Juan Carlos Rodriguez-Ubis、Ernesto Brunet、Helmut Pennemann、Michael Kossenjans、Jürgen Martens
a new series of chiral catalysts containing N,O-heterocycles of different sizes has been checked in the addition of diethylzinc to benzaldehyde, which was used as a model reaction. The catalysts were derivedfrom natural amino acids, following a relatively simple procedure, and in several cases excellent ee values were obtained. The results were complementary since ee's ranged from 98% (R) to 94% (S)
在将二乙基锌添加到苯甲醛中时,已检查了一系列新的含有不同尺寸 N,O-杂环的手性催化剂所发挥的对映选择性,苯甲醛用作模型反应。催化剂来源于天然氨基酸,遵循相对简单的程序,在一些情况下获得了极好的 ee 值。结果是互补的,因为 ee 在最终 1-苯基丙-1-醇的 98% (R) 至 94% (S) 过量范围内。分子力学计算表明,R 醇的产生可以通过类似于 Noyori 描述的机制来解释,其中 ZnEt2 仅与 N-C-C-OH 片段相互作用,而 S 对映异构体的形成需要直接亲本氨基酸的侧链和 N,O-杂环的参与。