Mechanism of the formation of herbertene from trans-didehydrobicyclofarnesol
作者:Georg Fráter、Urs Müller
DOI:10.1039/c39880001198
日期:——
Product and 13C labelling studies of the rearrangement of trans-didehydrobicyclofarnesol (+)-(1) to partly racemised herbertene [(+)-(2)] have led us to propose a mechanism for the reaction.
disclosed from commercially available 3-methyl cyclopenten-2-one. Following a catalytic enantioselective addition of arylboronic acids to enone 15, compounds 14a-b with all carbon quaternary stereocenters are synthesized in up to 90% ee in the presence of Pd(II)-PyOx (pyridine oxazoline). Compounds 14a-b are used as precursors for the asymmetric total syntheses of (+)-cuparene (1a) (35% overall yield
A total synthesis of (+)-herbertene from (+)-camphoric acid is described using a Diels–Alder reaction as the key step.
以Diels-Alder反应为关键步骤描述了由(+)-樟脑酸合成(+)-香波烯的过程。
FRATER, GEORG;MULLER, URS, J. CHEM. SOC. CHEM. COMMUN.,(1988) N 17, C. 1198-1200
作者:FRATER, GEORG、MULLER, URS
DOI:——
日期:——
Convenient route to enantiopure aryl cyclopentanes via Diels–Alder reaction of asymmetric dienes. Total synthesis of (+)-herbertene and (+)-cuparene
作者:Abhijit Nayek、Michael G.B Drew、Subrata Ghosh
DOI:10.1016/s0040-4020(03)00807-x
日期:2003.7
A general route for the synthesis of highly substituted aryl cyclopentanes has been developed involving Diels–Alder reaction of asymmetric dienes prepared from (+)-camphoric acid followed by aromatization of the resulting cyclohexene derivatives. Employing this protocol enantiospecific synthesis of (+)-herbertene and (+)-cuparene has been accomplished.