Asymmetric aldol reactions using chiral boron reagents: Application to the synthesis of tirandamycin A
摘要:
The bicyclic acetal 1, a key intermediate in previous synthetic studies on tirandamycin A, has been prepared in enantiomerically pure form starting from the (R)-ethylketone 2 and the aldehyde 3. A reagent controlled aldol reaction using (-)-(Ipc)2BOTf selectively gave the 1,2-syn-2,4-syn adduct 4, which was subsequently converted into 1 via the 1,3-anti diol 5.
Asymmetric aldol reactions using chiral boron reagents: Application to the synthesis of tirandamycin A
摘要:
The bicyclic acetal 1, a key intermediate in previous synthetic studies on tirandamycin A, has been prepared in enantiomerically pure form starting from the (R)-ethylketone 2 and the aldehyde 3. A reagent controlled aldol reaction using (-)-(Ipc)2BOTf selectively gave the 1,2-syn-2,4-syn adduct 4, which was subsequently converted into 1 via the 1,3-anti diol 5.
Acid-catalyzed rearrangement of pyran derivatives. An approach to the stereoselective synthesis of 1,3-diol derivatives
作者:Philip DeShong、David M Simpson、Ming-Teh Lin
DOI:10.1016/s0040-4039(00)99149-4
日期:1989.1
Peracid oxidation and HF-catalyzed treatment of furfuryl alcohol derivatives affords lactone products arising from a highly stereoselective rearrangementprocess. The lactones serve as precursors of highly functionalized anti-1,3-diol derivatives.
作者:Philip DeShong、Subban Ramesh、Varadaraj Elango、Joseph J. Perez
DOI:10.1021/ja00304a031
日期:1985.9
Synthese via l'addition du dianion de la diethoxyphosphorylacetyl-3 pyrrolidinedione-2,4 et de l'epoxy-7,8 [formyl-3' methyl-1' butene-2'yl]-3 trimethyl-1,4,8 dioxa-2,9bicyclo [3.3.1] nonanone-6
这些通过 l'addition du dianion de la diethoxyphosphorylacetyl-3 pyrrolidinedione-2,4 et de l'epoxy-7,8 [formyl-3'methyl-1' butene-2'yl]-3 trimethyl-1,4,8 合成dioxa-2,9bicyclo [3.3.1] nonanone-6
Total synthesis of tirandamycin. A short, efficient synthesis of the Ireland alcohol