Compounds of the general formula: ##STR1## wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4 and R.sub.5 are herein described, A is a straight or branched (C.sub.2 -C.sub.12)alkyl or a phenyl moiety and B is a moiety of the formula: ##STR2## The compounds are effective in potentiating the activity of chemotherapeutic anti-cancer agents by increasing the sensitivity of multi-drug resistant cells to such chemotherapeutic agents.
thioethers was disclosed, driven by PIII/PV═O redox cycling. In this work, one-step dehydroxylative thioetherification of alcohols was fulfilled with various hypervalent organosulfur compounds. This established strategy features an excellent functional group tolerance and broad substrate scope, especially inactivated alcohols. The scale-up reaction and further transformation of the product were also successful
公开了一种由 P III /P V = O 氧化还原循环驱动的无金属和无硫醇的有机磷催化形成硫醚的方法。在这项工作中,利用各种高价有机硫化合物实现了醇的一步脱羟基硫醚化。这种既定策略具有出色的官能团耐受性和广泛的底物范围,尤其是灭活醇。产品的放大反应和进一步转化也取得了成功。此外,该方法提供了一种无保护基且步骤有效的合成过氧化物酶体增殖物激活受体激动剂的方法,该方法在治疗哺乳动物骨质疏松症方面表现出良好的潜力。