Journal
JOURNAL OF ORGANIC CHEMISTRY
Volume 77, Issue 16, Pages 6937-6947Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jo301093f
Keywords
-
Categories
Funding
- College of Science Start-Up Grant from Nanyang Technological University (NTU)
- Science and Engineering Research Council Grant A*STAR, Singapore
- NTU
Ask authors/readers for more resources
A Bronsted acid-catalyzed method to prepare tri- and tetrasubstituted furans efficiently from cycloisomerization of but-2-yne-1,4-diols with or without 1,3-dicarbonyl compounds is described. By taking advantage of the orthogonal modes of reactivity of the alcoholic substrate through slight modification of the reaction conditions, a divergence in product selectivity was observed. At room temperature, p-TsOH center dot H2O-mediated tandem alkylation/cycloisomerization of the propargylic 1,4-diol with the beta-dicarbonyl compound was found to selectively occur to provide the tetrasubstituted furan product. On the other hand, increasing the reaction temperature to 80 degrees C was discovered to result in preferential p-TsOH center dot H2O-catalyzed dehydrative rearrangement of the unsaturated alcohol and formation of the 2,3,5-trisubstituted furan adduct.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available