Chemical transformations in the quassinoid series: Construction of the C(8),C(11) bridged hemiketal ring system of chaparrinone and related quassinoids
作者:Paul A. Grieco、David T. Parker、Philip Garner、Shigeki Sasaki
DOI:10.1016/s0040-4039(00)99255-4
日期:1989.1
A facile five-step sequence commencing with picrasane derivative 9 has been developed for elaboration of the sensitive ringC hemiketal unit of chaparrinone [cf pentacyclic alcohol 3].
GRIECO, PAUL A.;PARKER, DAVID T.;GARNER, PHILIP;SASAKI, SHIGEKI, TETRAHEDRON LETT., 30,(1989) N6, C. 3401-3404
作者:GRIECO, PAUL A.、PARKER, DAVID T.、GARNER, PHILIP、SASAKI, SHIGEKI
DOI:——
日期:——
Synthetic studies on quassinoids: total synthesis of (-)-chaparrinone, (-)-glaucarubolone, and (+)-glaucarubinone
作者:Paul A. Grieco、Jon L. Collins、Eric D. Moher、Thomas J. Fleck、Raymond S. Gross
DOI:10.1021/ja00067a025
日期:1993.7
The total synthesis of (-)-chaparrinone (3), (-)-glaucarubolone (4), and (+)-glaucarubinone (3) is described. The synthesis features an intermolecular Diels-Alder reaction between dienophile 6 and (E)-4-methyl-3,5-hexadienoic acid (17) in 5.0 M lithium perchlorate-ethyl acetate. Diels-Alder adduct 16 is converted via a two-step process into tetracyclic lactone 10. Inversion of configuration at C(9)