Synthesis of acid-labile diplasmenyl lipids for drug and gene delivery applications
作者:Jeremy A. Boomer、David H. Thompson
DOI:10.1016/s0009-3084(99)00033-x
日期:1999.6
design, synthesis and application of novel acid-sensitive lipids that will undergo facile lamellar (L alpha) to hexagonal (HII) phase transitions within these acidic sites. Previously, it has been demonstrated that plasmenylcholine-type lipids have excellent acid hydrolysis and contents release kinetics (Gerasimov et al., Biochim. Biophys. Acta. 1324 (1997) 200-214; Rui et al., J. Am. Chem. Soc. 120 (1998)
内体区室和局部缺血组织的低pH环境特征提供了一条内在的途径,可触发从特定设计的载体中释放特定部位的内含物。因此,该组的研究集中在新型酸敏感脂质的设计,合成和应用上,这些脂质将在这些酸性位点内经历容易的层状(L alpha)到六角形(HII)相变。以前,已经证明血浆胆碱型脂质具有优异的酸水解和内容物释放动力学(Gerasimov等,Biochim.Biophys.Acta.1324(1997)200-214; Rui等,J.Am.Chem。 Soc.120(1998)11213-11218)。本文描述了基于手性1,2-di-O-(1Z',9Z'-十八碳二烯基)-sn-甘油(6)平台的三种新的酸敏感性脂质的合成,显示磷胆碱(7),聚环氧乙烷(8)和O-氨基甲酰基-N-二乙烯-三胺(10)头基。通过六步合成,由(S)-(+)-2,2-二甲基-1,2-二氧戊环-4-甲醇以中间体的总产率28%获得中