ISSN:
0018-019X
Keywords:
Chemistry
;
Organic Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
The title compound 7 is obtained by reductive dehalogenation from 4-bromo-2,3-dihydro-2,2. -dimethyl-3-oxo-1H-pyrrole-1-carboxylate (8) in 90% yield, Aza-enone 7 undergoes [2 + 2] cycloaddition from the triplet state with both electron-rich and electron-deficient alkenes. The behaviour of 7 in light-induced reactions is compared to those of 2,2-dimethyl-3(2H)-furanone (1a) and of the corresponding thiophenone 1b. In the photodimerization and the cycloaddition to either 2,3-dimethylbut-2-ene or to dimethyl maleate of these ketonic five-membered heterocycles with one heteroatom, the overall efficiency increases in going from the furan 1a to the thiophene 1b and to the pyrrole 7.
Additional Material:
2 Tab.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/hlca.19890720818
