ISSN:
0009-2940
Keywords:
Chemistry
;
Inorganic Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
[4 + 2]-Cycloadditions with 5-Ethenyl-3,4-dihydro-2H-pyran and 5-Ethenyl-2,3-dihydro-1,4-dioxine5-Ethenyl-3,4-dihydro-2H-pyran (2a) and 5-ethenyl-2,3-dihydro-1,4-dioxine (2b) as hetero-cyclic donor-activated 1,3-dienes are prepared by Wittig alkenylation of the aldehydes 1a and 1b. [4 + 2]-Cycloadditions with dienophiles such as tetracyanoethene, β-nitrostyrene, diethyl azodicarboxylate, phenyltriazolinedione, and diethyl mesoxalate yield the new heterobi- and -tricycles 3-7.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/cber.19861191026
Permalink