Design and stereoselective synthesis of a C-aryl furanoside as a conformationally constrained CHIR-090 analogue
作者:Alberto Oddo、Ralph Holl
DOI:10.1016/j.carres.2012.06.006
日期:2012.10
target for the development of novel antibiotic substances against multidrug-resistant Gram-negative bacteria. The C-aryl glycoside 3 was designed as conformationally constrained analogue of the potent LpxC-inhibitor CHIR-090. The chiral pool synthesis of 3 started with D-mannose. The C-aryl glycoside 8 was synthesized stereoselectively by nucleophilic attack of 4-iodine-substituted phenyllithium and
UDP-3-O-[[(R)-3-羟基肉豆蔻酰基] -N-乙酰基葡糖胺脱乙酰基酶(LpxC)是开发针对多药耐药革兰氏阴性细菌的新型抗生素物质的有希望的目标。C-芳基糖苷3设计为有效LpxC抑制剂CHIR-090的构象约束类似物。3的手性库合成始于D-甘露糖。通过4-碘取代的苯基锂的亲核攻击并随后用Et(3)SiH还原来立体选择性地合成C-芳基糖苷8。通过一锅二醇裂解,CrO(3)氧化和酯化反应获得酯10。芳基碘化物11的Sonogashira反应生成炔烃17,炔烃17用H(2)NOH转化为异羟肟酸3。