Convergent Synthesis and Structural Confirmation of Phellodonin and Sarcodonin ε
摘要:
The first synthesis of members of the sarcodonin family, phellodonin and sarcodonin epsilon, is reported herein. This verifies that the unprecedented and seemingly unstable N,N-dioxide-containing benzodioxazine framework can be constructed in the laboratory and lends further support to the proposed structures. The key step in the synthesis involves a biomimetic hetero-Diels-Alder reaction between a pyrazine N-oxide and an ortho-quinone.
Synthesis-Guided Structure Revision of the Sarcodonin, Sarcoviolin, and Hydnellin Natural Product Family
作者:David W. Lin、Takeshi Masuda、Moritz B. Biskup、Jonathan D. Nelson、Phil S. Baran
DOI:10.1021/jo102228j
日期:2011.2.18
extensive studies aimed at their chemical synthesis. Key features of revised structure 1b include replacement of the N,N-dioxide moiety with an oxime, ring-opening of the central diketopiperazine, and transposition of the terphenyl wing from the 1β−2β position of 1a to the 2β−3β position of 1b. This structure revision arose from the serendipitous synthesis of a benzodioxane aminal (44) whose structure
Convergent Synthesis and Structural Confirmation of Phellodonin and Sarcodonin ε
作者:Ippei Usui、David W. Lin、Takeshi Masuda、Phil S. Baran
DOI:10.1021/ol400709f
日期:2013.5.3
The first synthesis of members of the sarcodonin family, phellodonin and sarcodonin epsilon, is reported herein. This verifies that the unprecedented and seemingly unstable N,N-dioxide-containing benzodioxazine framework can be constructed in the laboratory and lends further support to the proposed structures. The key step in the synthesis involves a biomimetic hetero-Diels-Alder reaction between a pyrazine N-oxide and an ortho-quinone.