Efficient syntheses, human and yeast farnesyl-protein transferase inhibitory activities of chaetomellic acids and analogues
作者:Sheo B. Singh、Hiranthi Jayasuriya、Keith C. Silverman、Cynthia A. Bonfiglio、Joanne M. Williamson、Russell B. Lingham
DOI:10.1016/s0968-0896(99)00312-0
日期:2000.3
resulted in the efficient syntheses of chaetomellic acids A and B in three steps with 75-80% overall yield. In this report, details of the original total syntheses of chaetomellic acids A, B and C, the new syntheses of acids A and B and structure-activity relationship of these compounds against various prenyl transferases including human and yeast FPTase and bovine and yeast GGPTase I are described. Chaetomellic
Chaetomellic酸是一类从cutetomella acutiseta分离出来的烷基二羧酸。它们是Ras法呢基蛋白转移酶的有效且高度特异性的法呢基焦磷酸(FPP)模拟抑制剂。我们先前已经描述了树蜡醛酸A的第一个基于生物遗传类型的醛醇缩合的全合成。对该合成步骤的后续步骤进行修饰,可在三步中高效合成树蜡醛酸A和B,总收率为75-80%。在此报告中,详细介绍了壳蜜三酸A,B和C的原始总合成,酸A和B的新合成以及这些化合物对各种异戊二烯基转移酶(包括人和酵母FPTase以及牛和酵母GGPTase I)的结构活性关系描述。甲壳果酸对人和酵母的FPTase具有不同的活性。Chaetomellic acid A抑制人和酵母FPTase活性,IC50值分别为55 nM和225 microM。相比之下,壳蜂蜜酸C对人和酵母酶的抑制活性只有10倍的差异。与基于分子建模的预测一致,具有较短烷基侧链(C-8)的化合物对FPTase完全无活性。