Synthesis of unsaturated β-amino acid derivatives from carbamates of the Baylis–Hillman products
作者:Marco Ciclosi、Cristiana Fava、Roberta Galeazzi、Mario Orena、José Sepulveda-Arques
DOI:10.1016/s0040-4039(02)00233-2
日期:2002.3
amount of DBU in DCM, N-p-toluenesulphonyl carbamates 6a–c, prepared starting from the corresponding Baylis–Hillman adducts, gave (E)-2-(p-toluenesulphonylaminomethyl)propenoates 3a–c, exclusively. On the contrary, changing DABCO for DBU, 2-methylene-3-p-toluenesulfonylamino esters 4a–f were obtained in good yield starting from N-p-toluenesulphonyl carbamates 6a–f. In analogy, N-acyl carbamates 9a–f were
通过用DBU在DCM,催化量的治疗ñ - p甲苯磺酰氨基甲酸酯6A - Ç,制备由相应的Baylis-希尔曼加合物开始,得到(ë)-2-(p -toluenesulphonylaminomethyl)propenoates 3A - Ç,排他。与此相反,改变为DABCO DBU,2-亚甲基-3- p -toluenesulfonylamino酯4A - ˚F以良好的收率得到从起始ñ - p甲苯磺酰氨基甲酸酯6A - ˚F。类似地,N-酰基氨基甲酸酯用DABCO在DCM中处理9a – f,得到2-亚甲基-3-酰基氨基酯5a – f。