螺环素 A、C 和 D 是已在海洋真菌菌株 LL-37H248 中鉴定的代谢物。它们独特的多环结构和有趣的生物活性使它们成为合成社区的有吸引力的目标。基于 5-取代萘醌的可扩展对映选择性环氧化、氧化/螺酮缩酮级联、苯酚单元的邻位选择性氯化和肟酯导向的乙酰氧基化、(-)-螺环素 A 和 C 的对映选择性全合成以及已经实现了 (-)-spiroxin D 的首次全合成。
Enantioselective Total Synthesis of (−)‐Spiroxins A, C, and D
作者:Xin Shu、Chong‐Chong Chen、Tao Yu、Jiayi Yang、Xiangdong Hu
DOI:10.1002/anie.202105921
日期:2021.8.16
targets for the synthetic community. Based on a scalable enantioselective epoxidation of 5-substituted naphthoquinone, an oxidation/spiroketalization cascade, ortho-selective chlorination of the phenol unit, and oxime-ester-directed acetoxylation, an enantioselectivetotalsynthesis of (−)-spiroxins A and C and the first totalsynthesis of (−)-spiroxin D have been achieved.
螺环素 A、C 和 D 是已在海洋真菌菌株 LL-37H248 中鉴定的代谢物。它们独特的多环结构和有趣的生物活性使它们成为合成社区的有吸引力的目标。基于 5-取代萘醌的可扩展对映选择性环氧化、氧化/螺酮缩酮级联、苯酚单元的邻位选择性氯化和肟酯导向的乙酰氧基化、(-)-螺环素 A 和 C 的对映选择性全合成以及已经实现了 (-)-spiroxin D 的首次全合成。
The Role of a Quinone Methide in the Sequence Specific Alkylation of DNA
作者:Moneesh Chatterjee、Steven E. Rokita
DOI:10.1021/ja00084a009
日期:1994.3
reduction or near-UV irradiation. Both conditions induced the formation of a transient and highly electrophilic intermediate consistent with a quinonemethide. Enzymatic reduction of 5-((mesyloxy)methyl)- and 5-(bromomethyl)naphthoquinone derivatives produced cross-linking between a target and probe sequence, but the equivalent 5-(acetoxymethyl), 5-(hydroxymethyl) and 5-methyl analogues were predictably inactive