We have developed a regiospecific method for synthesis of N'-phosphinatodiazene N-oxides, a previously unknown type of azoxy compounds in which the diazene oxide fragment is directly connected with the phosphinate group. The method involves reaction of amidoesters of alkyl- and arylphosphonic acids with nitroso compounds in the presence of dibromoisocyanurate.
Shape and Aggregating Tendency. The Aggregating Behavior of Eight Esters of Eight-Carbon Carboxylic Acids
摘要:
The aggregating tendencies of eight p-nitrophenyl esters of eight-carbon carboxylic acids (1-8) and two O-octyl phosphonates (10, 11) have been evaluated by measuring their critical aggregate concentrations (CAgC's). Results show that (1) branching reduces aggregating tendency and (2) flexibility of the hydrocarbon chain favors aggregation. The behavior of a ''spheroidal'' molecule 8 shows that shape is undoubtedly an important factor that affects the aggregating tendency. This conclusion is unmistakably confirmed by the CAgC of an ester of the seven-carbon acid 9.
The aggregating tendencies of eight p-nitrophenyl esters of eight-carbon carboxylic acids (1-8) and two O-octyl phosphonates (10, 11) have been evaluated by measuring their critical aggregate concentrations (CAgC's). Results show that (1) branching reduces aggregating tendency and (2) flexibility of the hydrocarbon chain favors aggregation. The behavior of a ''spheroidal'' molecule 8 shows that shape is undoubtedly an important factor that affects the aggregating tendency. This conclusion is unmistakably confirmed by the CAgC of an ester of the seven-carbon acid 9.
Synthesis of N?-phosphinatodiazene N-oxides
作者:S. G. Zlotin、M. V. Sharashkina、Yu. A. Strelenko、O. A. Luk'yanov
DOI:10.1007/bf00863379
日期:1992.11
We have developed a regiospecific method for synthesis of N'-phosphinatodiazene N-oxides, a previously unknown type of azoxy compounds in which the diazene oxide fragment is directly connected with the phosphinate group. The method involves reaction of amidoesters of alkyl- and arylphosphonic acids with nitroso compounds in the presence of dibromoisocyanurate.