The vast majority of commodity materials are obtained from fossil fuels. However, many
studies predict that all fossil resources will be depleted within a few centuries. Biomass …

Ever since the first isolation of Exaltolide 1 (Figure 1) in 1927 by Kerschbaum, 1 interest in
macrocyclic lactones, defined as lactones with more than 8 atoms in the ring, has been …

Alkyl and aryl phosphites and phosphines react with compounds having weak heteroatom–
heteroatom bonds, such as S S, O O, etc., and with azo compounds to form reactive …

An overview is given of the recent trends in the synthesis of naturally occurring 8-and 9-
membered lactones. During the past three decades of synthetic studies of medium-sized …

A systematic investigation of the direction and degree of stereoselectivity in aldol addition
reactions is presented involving achiral unsubstituted metal enolate and enolsilane …

Many drug-resistant tumors and cancer stem cells (CSC) express elevated levels of CD44
receptor, a cellular glycoprotein binding hyaluronic acid (HA). Here, we report the synthesis …

1. INTRODUCTION Ever since the first isolation of Exaltolide 1 (Figure 1) in 1927 by
Kerschbaum, 1 interest in macrocyclic lactones, defined as lactones with more than 8 atoms …

Oxido Ylide Reactions; Modification of Oxaphosphetane Stereochemistry Stereochemical
Results; Empirical 2: E Data Nonstabilized Ylides Ph, P= CHR Lithium Halide Effect on …

The genus Chaetomium fungi are considered to be a rich source of novel and bioactive
secondary metabolites of great importance. Up till now, a variety of more than 200 …

Abstract Macrolactonization of 3, 5-O-(3, 4-dimethoxybenzylidene)-9, 11-O-(2, 4, 6-
trimethylbenzylidene)(9S)-9-dihydroerythronolide A seco-acid (4) was reexamined under …