Several improvements, including a generally applicable method for reduction of aromatic nitro compounds to amines, were made to the preparation from 2,2′,4,4′-tetranitrobiphenyl of the meso atropisomer 1 of a bis-phosphonomethylated 4,6-diaryldibenzophosphole 5-oxide, previously obtained in impure form. A concomitant product 12 containing one phosphonomethyl group was formed by a novel intramolecular
从
双膦酰基甲基化的4,6-二芳基二苯并膦5的内消旋异构体1的2,2',4,4'-四
硝基联苯的制备方法进行了几处改进,包括将芳香族
硝基化合物还原为胺的通用方法-氧化物,以前以不纯形式获得。通过新颖的分子内置换形成了含有一个膦酰基甲基的伴随产物12。两种产物均通过专门开发的方法转化为分别包含四个和三个膦酰基甲基的
次膦酸-多
膦酸结晶,可在pH值为2-4的
水中形成稳定的单分散溶液。这些溶液催化了
2-甲基丙烯的
水合成叔酸
丁醇比同等酸度的
甲苯-4-
磺酸溶液更有效。