32849-92-6

Upstream product

• 938-24-9 indantrione 
• 104-94-9 4-methoxy-aniline 
• 95-54-5 1,2-diamino-benzene 
• 6954-91-2 11H-Indeno[1,2-b]quinoxaline-11-one 

Relevant academic research and scientific papers

Synthesis of some novel indeno[1,2-b]quinoxalin spiro-β-lactam conjugates

This article reports the synthesis of some new spiro-β-lactams bearing an indeno[1,2-b]quinoxaline ring system, prepared by a [2?+?2] cycloaddition of ketenes with imines derived from 11-H-indeno[1,2-b]quinoxalin-11-one. The structures of newly synthesized spiro-β-lactams 2a–i and 3a-i were characterized by FT-IR,1H NMR,13C NMR, mass spectrometry and elemental analyses. The relative stereochemistry of spiro-β-lactams 2a and 3a was determined unequivocally by X-ray crystallographic studies.

Highly efficient one-pot four-component Kabachnik-Fields synthesis of novel α-amino phosphonates under solvent-free and catalyst-free conditions

In the present study, a simple and highly efficient protocol for the preparation of novel α-amino phosphonates is achieved based on the one-pot reaction of ninhydrin, 1,2-phenylenediamines, aniline derivatives, and dialkyl or diaryl phosphites, without using any catalyst under solvent-free conditions. The main advantages of the reaction are short reaction time, high yields, simple workup, and no need for further purification.