An experimentally simple, mild and straightforward synthetic route towards diversely functionalized (E)-3-acylacrylic acids is described, with Horner–Wadsworth–Emmons (HWE) reaction as the key step. The substrate scope and limitations of the HWE reaction were investigated with a range of β-ketophosphonates. Glyoxylic acid monohydrate was demonstrated to be fully compatible with the HWE reaction conditions
The introduction of a cyclic amino acid in a peptide is one of the best methods to rigidify a strand. A general approach towards a new class of seven-membered ring amino acids is described starting from (S)-tribenzyl glutamic acid γ-aldehyde, which reacts with β-keto phosphonates to generate the Horner–Wadsworth–Emmons product. In the presence of H2 and a Pd catalyst, a four-step process occurs involving
Toward the synthesis of 1′<i>E</i>-isomer of <i>ent</i>-hyptenolide
作者:Purushotham Reddy Karra、Sabitha Gowravaram
DOI:10.1080/00397911.2018.1476719
日期:2018.9.17
Abstract A short total synthesis of a diacetoxylated E,E-diene lactone ent-hyptenolide, was achieved involving from Phosphonate and cis-butene 1,4-diol. Brown Asymmetric allylation, Acrylation, Acetylation, Ring-closing metathesis as the key steps has been described. Moreover, the biological activity of ent-hyptenolide was evaluated on HeLa, A549, IMR32, and MDA-MB231 cancer cell lines. The ent-hyptenolide
Synthesis of iso-epoxy-amphidinolide N and des-epoxy-caribenolide I structures. Revised strategy and final stages
作者:K. C. Nicolaou、Paul G. Bulger、William E. Brenzovich
DOI:10.1039/b602021f
日期:——
agents amphidinolide N (1) and caribenolide I (2) has been developed, and the totalsynthesis of iso-epoxy-amphidinolide N and des-epoxy-caribenolide I structures is described. Central to the revised strategy was the use of a Horner-Wadsworth-Emmons olefination between beta-ketophosphonate 51 and aldehyde 14 to construct the C1-C13 sector common to both 1 and 2. Stereoselective alkylation of hydrazone 11