Organyl thiolate, selenolate or tellurolate anions reacted with alkynylphosphonates 1 to give diethyl 2-(organyl)-2-(organochalcogenyl)vinylphosphonates [β-organochalcogenyl vinylphosphonates] 2 in satisfactory yields. The reaction was stereoselective, giving predominantly or exclusively the (Z)-stereoisomer.
硫醇酸根,
硒酸根或
碲酸根阴离子与炔基
膦酸酯1反应,以令人满意的收率得到2-(有机基)-2-(有机氧代烷基)
乙烯基膦酸酯[β-有机氧代烷基
乙烯基膦酸酯] 2。反应是立体选择性的,主要或仅产生(Z)-立体异构体。