1.Aqueous titanium trichloride promoted intermolecular reductive cyclization of 1,2 -diketone and o-nitroaniline in basic media provides a convenient method for the synthesis of quinoxaline derivatives.

1.本文研究了三氯化液作用下,邻胺与1,2-二酮在碱性介质中分子间的成环反应,提了一个方便地合成取代喹喔啉类化合物的方法。

2.The article is about how to use phosgene and p-nitrophenylamine to react in acetic ether's liquefier to produce p-nitro-phenyl isocyanate, Its best technological condition have been discussed.

2.介绍用光气和对胺在乙酸乙酯剂中反应来制备对异氰酸酯的方法，并讨论了其最佳工艺条件。