The Diels-Alder reaction with 6-methylene-7-octenoic acid, a functionalised butadiene
作者:G. Cardinale、J. A. M. Laan、J. P. Ward
DOI:10.1002/recl.19871060205
日期:——
A novel functionalisedbutadiene, 6-methylene-7-octenoicacid, was synthesized from myrcene (7-methyl-3-methylene-1,6-octadiene). Diels-Alder adducts were formed with maleic anhydride and cyclopentene-3,5-dione.
Type 2 Intramolecular <i>N</i>-Acylnitroso Diels−Alder Reaction: Stereoselective Synthesis of Bridged Bicyclic Oxazinolactams
作者:Chun P. Chow、Kenneth J. Shea、Steven M. Sparks
DOI:10.1021/ol026075k
日期:2002.8.1
[reaction: see text] The type 2 intramolecular N-acylnitroso Diels-Alderreaction has been employed for the synthesis of substituted bridged bicyclic oxazinolactams. Upon oxidation of hydroxamic acid 6, a 3-benzylated oxazinolactam (7) was synthesized with complete diastereoselectivity. Elaboration of cycloadduct 7 liberated a cis-3,7-disubstituted azocin-2-one (9).
Cross-coupling reaction of 2-(1,3-butadienyl)magnesium chloride with alkyl or aryl halides by lithium chloride-cupric chloride (Li2CuCl4), a superior catalyst