Ein neuer Zugang zu Spiroorthocarbonaten und neuen Orthokohlensäure-Derivaten
作者:Peter Mues、Hans-Josef Buysch
DOI:10.1055/s-1990-26845
日期:——
A New Approach to Spiroorthocarbonates and New Orthocarbonic Acid Derivatives New and simple processes have been developed, which give in good or excellent yields new diphenoxyalkanediyldioxymethanes, symmetrical and unsymmetrical spiroorthocarbonates, spirocyclic orthothiocarbamic acid esters, and acetals of urea by successive or simultaneous substitution of chloro and phenoxy groups contained in dichlorodiphenoxymethane.
3,3,9,9-Tetramethyl-1,5,7,11-tetraoxaspiro[5.5]undecane is introduced as a new, stable and chemoselective reagent for the protection of aldehydes and ketones under mild reaction condition in high yield.