Total Syntheses of Aromatic Abietane Diterpenoids Utilizing Advances in the Pummerer Rearrangement
作者:Xin Li、Rich G. Carter
DOI:10.1021/acs.orglett.8b02060
日期:2018.9.21
The first totalsyntheses of triptobenzene T, vitexifolin C, 4-epi-triptobenzene L, triptobenzene L, and nepetaefolin F have been accomplished through an enantioselective, common intermediate approach and have enabled the confirmation and/or establishment of the absolute stereochemistry of each natural product synthesized. Application of three new and/or underutilized Pummerer reaction pathways proved
Total synthesis of atropisomeric indolosesquiterpenoids <i>via</i> N–N bond formation: dixiamycins A and B
作者:Rhituparna Nandi、Sovan Niyogi、Sourav Kundu、Vipin R. Gavit、Mintu Munda、Ranjit Murmu、Alakesh Bisai
DOI:10.1039/d2sc07119c
日期:——
dimerization from the naturally occurring monomer xiamycin A methylester (2b); this preparation also represents the first total synthesis of dixiamycin A (1a). The monomer xiamycin A methylester (2b) was synthesized via a late-stage Buchwald Pd(II)-mediated aerobic dehydrogenative C–N bond formation.
N-N 二聚吲哚半萜生物碱构成了一类尚未充分研究的结构有趣的天然产物。在此,我们报告了第一个通过N-N键形成不对称全合成这些阻转异构吲哚半萜类化合物的化学氧化方法。具体来说,二克霉素 A ( 1a ) 和 B ( 1b ) 是通过 Cu( I ) 介导的有氧脱氢二聚反应从天然存在的单体克霉素 A 甲酯 ( 2b ) 制备的;该制剂也代表了双氧霉素 A ( 1a )的首次全合成。单体夏霉素A甲酯( 2b )是通过后期Buchwald Pd( II )介导的有氧脱氢C-N键形成合成的。