Condensation of the phthalide sulfide with an ortho-quinone monoketal was employed as a key step in the first total synthesis of a derivative of (+/-)-PD 116740.
Condensation of the phthalide sulfide with an ortho-quinone monoketal was employed as a key step in the first total synthesis of a derivative of (+/-)-PD 116740.
Deleterious effect of 7-methyl group on glycosylation of 2-naphthols
作者:Prithiba Mitra、Subhajit Mandal、Soumen Chakraborty、Dipakranjan Mal
DOI:10.1016/j.tet.2015.06.045
日期:2015.8
C-Glycosylations of several 2-naphthols with different glycosyl donors have been investigated in the pursuit of the total synthesis of mayamycin (I). While glycosylations of the parent 2-naphthol are readily achievable, those of 5-methoxy-7-methyl-2-naphthol (6) embodying the target are ineffective under different Lewis acidic conditions. The inefficiency of the glycosylation of 6 has been attributed to the steric effect exerted by C7 methyl group, which was corroborated by glycosylation studies of different 2-naphthols. (C) 2015 Elsevier Ltd. All rights reserved.
Total Synthesis of (±)-<i>O</i>-Methyl PD 116740
作者:Frank M. Hauser、Warren A. Dorsch、Dipakranjan Mal
DOI:10.1021/ol026104r
日期:2002.6.1
Condensation of the phthalide sulfide with an ortho-quinone monoketal was employed as a key step in the first total synthesis of a derivative of (+/-)-PD 116740.