2-Propynyl 2,3,4,6-tetra-O-acetyl-α-D-mannopyranoside.

The article provides information on a study which examined the structure of 2-Propynyl 2,3,4,6-tetra-O-acetyl-&alph-D-mannopyranoside. The study found that with the acetylenic group gauche with respect to position C1, the 2-propynil group in the title compound adopts an exoanomeric conformation. The 13C NMR chemical shifts has been compared with solution and the solid state. The results of the comparison suggests that the acetylenic group also adopts a conformation anti to C1 in solution.