FeSO<sub>4</sub>·7H<sub>2</sub>O-Catalyzed Four-Component Synthesis of Protected Homoallylic Amines
作者:Qi-Yi Song、Bai-Ling Yang、Shi-Kai Tian
DOI:10.1021/jo0704558
日期:2007.7.1
An efficient catalytic four-component reaction of carbonyl compounds (or acetals/ketals), benzyl chloroformate (CbzCl), 1,1,1,3,3,3-hexamethyldisilazane (HMDS), and allyltrimethylsilane has been successfully developed to produce Cbz-protected homoallylic amines in the presence of 5 mol % of iron(II) sulfate heptahydrate (FeSO4·7H2O), an inexpensive and environmentally friendly catalyst, at room temperature
An efficient method for the one-pot synthesis of secondary and tertiary N-homoallylic carbamates using catalytic amount of HBF4 center dot OEt2 is described. The reaction proceeded smoothly to afford the corresponding N-homoallylic carbamates in good to high yields. Operationally simple and easily scalable features make this method more practical over existing methods. Use of HBF4 center dot OEt2 as an acid catalyst also proves the catalytic activity of fluorinated acid catalyst in this important organic transformation. (C) 2014 Elsevier B.V. All rights reserved.