An Efficient Stereospecific Preparation of (Z)-3-Methylidene-selenophthalides and (Z)-3-Methylidenetellurophthalides [1]

Article abstract of DOI:10.1002/jhet.5570350131

(Z)-3-Methylideneselenophthalides 5A and (Z)-3-methylidenetellurophthalides 5B were easily prepared by the regioselective and stereoselective reaction of 2-ethynylbenzoyl chlorides 3 with sodium hydroselenide and sodium hydrotelluride in good yields, resp