1,3-Oxazinan-2-ones from Amines and 1,3-Diols through Dialkyl Carbonate Chemistry
作者:Pietro Tundo、Con McElroy、Fabio Aricò
DOI:10.1055/s-0031-1290368
日期:2012.7
A one-pot green synthesis of 1,3-oxazinan-2-ones from amines and 1,3-diols in the presence of a dialkyl carbonate and potassium tert-butoxide is described. Four dialkyl carbonates were utilised: dimethyl carbonate, diethyl carbonate, diprop-2-yl carbonate, and tert-butyl methyl carbonate. The more hindered the dialkyl carbonate used, the higher the yield of 1,3-oxazinan-2-one. Four 1,3-diols were reacted
描述了在碳酸二烷基酯和叔丁醇钾的存在下,从胺和 1,3-二醇中合成 1,3-oxazinan-2-ones 的一锅法绿色合成。使用了四种碳酸二烷基酯:碳酸二甲酯、碳酸二乙酯、碳酸二丙酯和碳酸叔丁基甲基酯。所用碳酸二烷基酯的受阻越多,1,3-oxazinan-2-one 的产率就越高。四种具有伯-伯、伯-仲、伯-叔和仲-叔官能团的 1,3-二醇反应,恶嗪酮的产率随着二醇的阻碍增加而降低。在含有伯和仲或叔官能团的二醇的情况下,在如此形成的恶嗪酮的6-位选择性地发现取代基。然后将优化的条件用于不同的亲核试剂,