acid derivatives has been developed. The one-pot synthesis was very convenient to perform by using the aminohalogenation reaction of alpha,beta-unsaturated esters and ketones followed by treatment with specific bases. Only two [2.2.2] bicyclic organic bases were found to be effective for this transformation. Good yields (58-68%) and excellent Z-selectivity were obtained for 12 examples. [reaction: see
已经开发出一种针对α,β-脱氢
氨基酸衍
生物的新的,容易的且高度立体选择性的方案。通过使用α,β-不饱和酯和酮的
氨基卤代反应,然后用特定的碱进行处理,一锅合成非常方便。发现仅两种[2.2.2]双环有机碱可有效用于该转化。对于12个实施例,获得了良好的产率(58-68%)和优异的Z-选择性。[反应:看文字]