New orthogonally functionalized synthetic blocks from R-(−)-carvone
摘要:
The intramolecular cyclization of (-)-cis-carveol under iodine treatment afforded (1R,5R,6S)-6-iodomethyl-2,6-dimethyl-7-oxabicyclo[3.2.1]oct-2-ene that was subjected to allyl oxydation with the complex CrO3DMP giving a synthetically valuable building block, (1R,5R,6S)-6-iodomethyl-2,6-dimethyl-7-oxabicyclo[3.2.1]oct-2-ene-4-one. In the latter the double bond was cleaved by ozonization to obtain the expected trioxo derivative, and the subsequent ozonolysis of its enol form provided a multiple functionalized tetrahydrofuran derivative.
New orthogonally functionalized synthetic blocks from R-(−)-carvone
摘要:
The intramolecular cyclization of (-)-cis-carveol under iodine treatment afforded (1R,5R,6S)-6-iodomethyl-2,6-dimethyl-7-oxabicyclo[3.2.1]oct-2-ene that was subjected to allyl oxydation with the complex CrO3DMP giving a synthetically valuable building block, (1R,5R,6S)-6-iodomethyl-2,6-dimethyl-7-oxabicyclo[3.2.1]oct-2-ene-4-one. In the latter the double bond was cleaved by ozonization to obtain the expected trioxo derivative, and the subsequent ozonolysis of its enol form provided a multiple functionalized tetrahydrofuran derivative.
Chiral building blocks from R-(–)-carvone: N-bromosuccinimidemediated addition–sceletal rearrangement of (–)-cis-carveol
作者:Ruslan F. Valeev、Nataliya K. Selezneva、Zoya A. Starikova、Evgenii Yu. Pankrat’ev、Mansur S. Miftakhov
DOI:10.1016/j.mencom.2010.03.004
日期:2010.3
Synthetically valuable bicyclic blocks 5, 7 and 9 were prepared by the oxidative cleavage of the double bond of 4 with the RuCl3- NaIO4 system and O-3.