作者:Robert E. Hanes、Jong Chan Lee、Sheryl N. Ivy、Anna Palka、Richard A. Bartsch
DOI:10.3998/ark.5550190.0011.718
日期:——
the method was used for the preparation of monobenzocrown ethers. Interestingly, for the preparation of monobenzocrown ethers, [2+2] adducts were discovered to be significantly contaminating the products. Dimesylates were chosen as the leaving group due to their ease or preparation and the ability to use the unpurified products with no apparent impact on the macrocyclization.
探索了冠醚的大环化及其制备方法。我们提出了一种稳健、可扩展的方法来制备这些大环。此外,研究了改变前体结构的影响,以确定双酚和二甲磺酸酯的“切割”是否影响反应过程,如通过产率测量的。此外,使用儿茶酚衍生物,该方法用于制备单苯并冠醚。有趣的是,在制备单苯并冠醚时,发现 [2+2] 加合物严重污染了产品。选择二甲磺酸盐作为离去基团是因为它们易于制备,并且能够使用未纯化的产物而对大环化没有明显影响。