S. Yamada, Suzuki Takayoshi, H. Takayama
1981
Citations
0
Influential Citations
22
Citations
Journal
Tetrahedron Letters
Abstract
Abstract Vitamin D-sulfur dioxide adducts undergo regioselective methylation at C-6 with sodium hydride used as the base and at C-19 with lithium tetramethylpiperidide. The methylated adducts are converted to the corresponding vitamin D derivatives by extrusion of sulfur dioxide.