Stereo-selective esterification

Dry mycelia of molds can be effectively used for (stereo) selective esterification of different alcohols and carboxylic acids in organic solvent with notable advantages, such as the following. 

Direct Esterification with Dry Mycelia of Molds a (Stereo)selective, Mild and Efficient Method for Obtaining Structurally Diverse Esters... 

Tatsuta s oleandomycin synthesis is based on the construction of the aglycone by coupling of the C1-C7 (131) and Cg-Ci3 (136) segments, which are derived from L-rhamnose and (S)-( + )-methyl 3-hydroxy-2-methylpropionate, respectively, and on the stereo- and regioselective introduction of the two sugar moieties. Methods for selective esterification and for the synthesis of 2-deoxy-a-glycosides were developed in the course of the synthesis. 

For a trans-esterification reaction, chemical catalysis comprises the application of homogeneous and heterogeneous (acid and base) catalysts. The role of solid base and acid catalysts has been well reviewed (Luque et al., 2008 Dacquin et al., 2010 Wilson and Lee, 2012). The selectivity of the catalyst (chemo-, regjo-, stereo, and enantio selectivities), optimization of... 

---