PEG400-enhanced synthesis of gem-dichloroaziridines and gem-dichlorocyclopropanes via in situ generated dichlorocarbene
作者:Qing-Wen Song、Bing Yu、An-Hua Liu、Ying He、Zhen-Zhen Yang、Zhen-Feng Diao、Qing-Chuan Song、Xue-Dong Li、Liang-Nian He
DOI:10.1039/c3ra43307b
日期:——
efficient phase transfer catalyst for the cycloaddition reaction of imines with dichlorocarbene, which is generated in situ from chloroform and sodium hydroxide, to give gem-dichloroaziridines in moderate to excellent yields at ambient temperature. This protocol is also extended to the synthesis of cyclopropanes from a variety of alkenes. In this study, PEG400 behaves as a phase transferreagent thanks to
Sonocatalyzed facile and mild one pot synthesis of gem-dichloroaziridine derivatives under alkaline conditions
作者:Hossein Naeimi、Khadijeh Rabiei
DOI:10.1016/j.ultsonch.2011.06.012
日期:2012.1
In this research, rapid and efficient preparation of 2,2-dichloro-1,3-diarylaziridines through the reaction of Schiff base compounds with dichlorocarbene yielded in situ from chloroform and sodium hydroxide without any phase transfer catalyst under ultrasonic irradiation is described. The advantages of this reaction are very short reaction times, excellent product yields, simplicity of the method and
A Novel Catalyst-Free One-Pot Synthesis of Some New N-(α-Hydroxybenzyl)formamides by Treatment of 2,2-Dichloroaziridines with Dimethyl Sulfoxide and Water under Neutral Conditions
作者:Hossein Naeimi、Khadijeh Rabiei
DOI:10.1002/hlca.201100453
日期:2012.7
A novel, mild, and efficient method is reported for the preparation of new N‐(α‐hydroxybenzyl)formamides in excellent yields and appropriate reaction times through the reaction of 2,2‐dichloroaziridines with aqueous DMSO as the O‐donor underneutralconditions at 70–85°.
Nanocrystalline magnesium oxide as a solid base catalyst promoted one pot synthesis of gem-dichloroaziridine derivatives under thermal conditions
作者:H. Naeimi、Kh. Rabiei、M. Rezaei、F. Meshkani
DOI:10.1007/s13738-012-0137-9
日期:2013.2
In this study, efficient and mild synthesis of gem-dichloroaziridines from Schiff bases in the presence of nanocrystalline magnesium oxide/chloroform as a novelsource of dichlorocarbene intermediate under thermal conditions have been described. The reaction is dramatically enhanced in the presence of nanocrystalline magnesium oxide, and any byproducts were detected during or after the reaction. The
Ultrasonic-Assisted Synthesis of 1,3-Diaryl-2,2-dichloroaziridine Derivatives in the Presence of Phase-Transfer Catalyst under Low-Concentration Alkaline Conditions
作者:Hossein Naeimi、Khadijeh Rabiei
DOI:10.1246/bcsj.20110106
日期:2011.10.15
In this research, rapid and efficient preparation of 1,3-diaryl-2,2-dichloroaziridines through the reaction of Schiff base compounds with dichlorocarbene yielded in situ in the presence of cetyltrimethylammonium bromide (CTAB) as phase-transfer catalyst under ultrasonic irradiation is described. The advantages of this reaction are very short reaction times, excellent product yields, simplicity of the method, and high purity of products.