A Novel Three-Component One-Pot Reaction Involving Alkynes, Urea or Thiourea, and Aldehydes
作者:Shenlin Huang、Yuanjiang Pan、Yulin Zhu、Anxin Wu
DOI:10.1021/ol051458e
日期:2005.8.1
A novelthree-component, one-pot condensation yielding 2-amino-4H-1,3-oxazines or 2-amino-4H-1,3-thiazines from alkynes, urea or thiourea, and aldehydes is described. [reaction: see text]
Synthesis of 2-amino-4H-1,3-oxazines and 2-amino-4H-1,3-thiazines through a Yb(OTf)3-assisted, acid-catalyzed one-pot cyclocondensation reaction
作者:Salil Putatunda、Arijit Chakraborty
DOI:10.1007/s10593-015-1770-x
日期:2015.8
An efficient synthesis of 2-amino-4,6-diaryl-4H-1,3-oxazine and 2-amino-4,6-diaryl-4H-1,3-thiazine derivatives has been demonstrated through a one-pot multicomponent cyclocondensation reaction. Ytterbium triflate and concentrated HCl has been utilized as the catalyst system for this reaction. The method produced good to excellent product yields and allowed a wide variation of the substituents in both
通过一锅法证明了2-氨基-4,6-二芳基-4 H -1,3-恶嗪和2-氨基-4,6-二芳基-4 H -1,3-噻嗪衍生物的有效合成多组分环缩合反应。三氟甲磺酸和浓盐酸已被用作该反应的催化剂体系。该方法产生了良好或优异的产物收率,并且允许两个芳基部分中的取代基变化很大。