Phospha-alkynes-Useful Building Blocks in Organic Chemistry1

…, W Rösch, T Allspach, U Annen, K Blatter…

Index: Rregitz, Manfred; Roesh, Wolfgang; Allspach, Thomas; Annen, Ulrich; Blatter, Karsten; et al. Phosphorus and Sulfur and the Related Elements, 1987 , vol. 30, p. 479 - 482

Full Text: HTML

Citation Number: 19

Abstract

Abstract The syntheses of phospholes (7,[3+ 2]-cycloaddition), bicyclophosphaalkenes (17,[4+ 2]-cycloaddition), and phosphabenzenes (15,[4+ 2]-cycloaddition followed by an extrusion process) starting from the phosphaalkynes (4) are described. The 2–Dewar phosphabenzene 18, obtained from the cyclobutadiene 21 and 4 (R= tBu), is the starting material for the synthesis of the valency isomers 19, 20, 22, and 23.