Synthesis and stereochemistry of occidenol, a 4,5-dihydrooxipin-containing sesquiterpene: a pericyclic approach.
The first synthesis of occidenol (1), a 4,5-dihydrooxipin-containing sesquiterpene, is reported. The stereochemistry is corrected from that postulated by Tomita and Hirose, by a synthesis starting with natural occidentalol (4), the stereochemistry of which was also initially in error. The route (schemes 1 and 2) utilizes a retro-electrocyclic [2+2+2] fragmentation with N2 expulsion from 9 to produce, quantitatively, the acid sensitive dihydrooxipin system.
Marx
John N
JN
Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, TX 79409, USA. john.marx@ttu.edu
Ajlouni
Abdulaziz
A
D015394:Molecular Structure; D012717:Sesquiterpenes / Q000138:chemical synthesis*; D013237:Stereoisomerism; D029783:Thuja / Q000737:chemistry*
D012717:Sesquiterpenes; C548381:occidenol