Modular Total Syntheses of the Alkaloids Discoipyrroles A and B, Potent Inhibitors of the DDR2 Signaling Pathway
作者:Yiwen Zhang、Martin G. Banwell、Paul D. Carr、Anthony C. Willis
DOI:10.1021/acs.orglett.5b03672
日期:2016.2.19
Compound 23 was itself prepared in seven steps from parent pyrrole using Ullmann–Goldberg and Suzuki–Miyaura cross-coupling, Vilsmeier–Haackformylation, electrophilic bromination, and Wittig olefination reactions as key steps. Related chemistry has been used to prepare discoipyrrole B (2).
Total Syntheses of Discoipyrroles A, B, and C, Three Marine Natural Products
作者:Gaurav G. Dake、Krishna P. Kaliappan
DOI:10.1021/acs.joc.4c00462
日期:2024.4.19
Herein, we describe our efforts culminating in the totalsyntheses of discoipyrroles A, B, and C in 6, 6, and 7 steps respectively with excellent overall yield. Totalsyntheses of these unique natural products have been accomplished involving microwave-mediated Paal–Knorr pyrrole synthesis, Pd-catalyzed carbonylative transformation, and MoOPH (Vedejs reagent) oxidation as key reactions to construct
Base-Mediated Direct Transformation of <i>N</i>-Propargylamines into 2,3,5-Trisubstituted 1<i>H</i>-Pyrroles
作者:Pawan K. Mishra、Shalini Verma、Manoj Kumar、Akhilesh K. Verma
DOI:10.1021/acs.orglett.8b03112
日期:2018.11.16
An efficient and base-mediated intramolecular cyclization of N-propargylamines for the synthesis of structurally diversified pyrroles in high yield has been described. The developed methodology is broadly applicable and is tolerated by a variety of functional groups. Key intermediates of natural product discoipyrrole C as well as HMG-CoA-reductase inhibitor have been successfully synthesized using developed chemistry. The proposed mechanism was supported by control experiments.