作者:Yuri N. Belokon'、William Clegg、Ross W. Harrington、Eisuke Ishibashi、Hiroshi Nomura、Michael North
DOI:10.1016/j.tet.2007.07.016
日期:2007.9
cocatalyst are developed. Under these conditions, two chiral cyanoformates also reacted with aldehydes to give cyanohydrin carbonates. The stereochemistry of this process is predominantly determined by the stereochemistry of the titanium(salen) catalyst and the stereochemistry of two of the cyanohydrin carbonates was confirmed by X-ray crystallography. In a further extension of the chemistry, a homogeneous
从合适的醇和草酰氯开始,提出了一种新的和一般的烷基氰基甲酸酯的合成方法。这用于从对映体纯的伯醇和仲醇制备对映体纯的氰基甲酸酯。研究了在氰化钾作为助催化剂存在下,由对映体纯的钛(salen)催化剂催化的向醛中添加各种非手性氰基甲酸酯的最佳条件。在这些条件下,两种手性氰基甲酸酯也与醛反应生成氰醇碳酸盐。该方法的立体化学主要由钛(salen)催化剂的立体化学确定,并且两个氰醇碳酸盐碳酸酯的立体化学通过X射线晶体学证实。在化学的进一步扩展中,