Synthesis of daunosamine hydrochloride and intermediates used in its
申请人:Purdue University
公开号:US04301276A1
公开(公告)日:1981-11-17
A process for synthesizing daunosamine hydrochloride is disclosed. Intermediates useful for synthesizing daunosamine hydrochloride, and processes for preparing such intermediates, are also disclosed.
Oxidation of Fully Protected Glycals by Hypervalent Iodine Reagents
作者:Andreas Kirschning
DOI:10.1021/jo00110a028
日期:1995.3
A new application of organoiodine(III) is presented. Fully protected glycals are directly converted into 2,3-dihydro-4H-pyran-4-ones by [hydroxy(tosyloxy)iodo]benzene (PhI(OH)OTs, 1). The detailed study reveals that this conversion is independent of the relative stereochemistry as well as the nature of protection on the pyran ring. 3-O-Silyl groups are most smoothly converted into the keto group giving 2,3-dihydro-4H-pyran-4-ones in yields up to 74%. In contrast, 4,6-di-O-acetyl-3-deoxyglucal (19) affords the rearranged oxidation product 32. Both observations can be reconciled by the proposed mechanism.
Berkowitz, David B.; Danishefsky, Samuel J.; Schulte, Gayle K., Journal of the American Chemical Society, 1992, vol. 114, # 12, p. 4518 - 4529
作者:Berkowitz, David B.、Danishefsky, Samuel J.、Schulte, Gayle K.