Journal ArticleDOI
Novel 3,3a,5,9b-tetrahydro-2H-furo[3,2-c][2] benzopyran derivatives: synthesis of chiral glycol benzyl ether herbicides.
Reads0
Chats0
TLDR
Novel tricyclic 3,3a,5,9b-tetrahydro-2H-furo[3,2-c][2]benzopyran (TFB) derivatives were synthesized, and their herbicidal activities were elucidated.Abstract:
Novel tricyclic 3,3a,5,9b-tetrahydro-2H-furo[3,2-c][2]benzopyran (TFB) derivatives were synthesized, and their herbicidal activities were elucidated. They were synthesized from D-glucose as a natural chiral source. The formation of the TFB skeleton was achieved by a Friedel-Crafts type intramolecular cyclization of methyl 5-deoxy-2,3-O-dibenzyl-5-C-methyl-D-xylofranosides. The intramolecular cyclization was dependent upon the electronic effects of the substituents at the C-2 benzyloxy group of methyl xylofranosides. Some TFBs exhibited a remarkable herbicidal activity to annual paddy weeds, such as Echinochloa sp, without injury to the rice.read more
Citations
More filters
Journal ArticleDOI
A facile, efficient, and sustainable chitosan/CaHAp catalyst and one-pot synthesis of novel 2,6-diamino-pyran-3,5-dicarbonitriles.
TL;DR: The reported protocol has many benefits, such as ease of preparation, use of a green solvent, reduced reaction times, excellent product yields, and operational simplicity.
Journal ArticleDOI
A [2+2+2]-cyclotrimerization approach for the synthesis of enantiopure isochromans using a carbohydrate derived dialkyne template
TL;DR: In this paper, an easy access to enantiopure isochromans through cross alkyne trimerization of a glucose derived dialkyne was developed, which was converted into a novel tricyclic nucleoside by simple transformations.
Journal ArticleDOI
Polysubstituted Isochroman Derivatives with Plant Growth Regulating Properties on Wheat (Triticum aestivum L. cv Klein Escorpion)
TL;DR: In this paper, the synthesis of isochroman derivatives 4-9 from α-hydroxylactone 3 was reported, which carried different substituents on C-3, C-4, and C-8, exhibited different degrees of inhibition of the vegetative growth of wheat (Triticum aestivum cv Klein Escorpion).
Journal ArticleDOI
Triton-B-Catalyzed, Efficient, Solvent-Free Synthesis of Benzopyrans
TL;DR: A microwave-promoted novel protocol for the synthesis of substituted benzopyrans from the corresponding variety of substituted hydroxy acetophenones and keto compounds using benzyltrimethylammonium hydroxide (Triton-B) under solvent-free conditions has been developed.
Journal ArticleDOI
Novel glycol benzyl ether herbicides: Herbicidal activity of 3,3a,5,9b-tetrahydro-2H-furo[3,2-c][2]benzopyran derivatives
TL;DR: In this article, the structure-activity relationship of novel glycol benzyl ether herbicides, 3,3a,5,9b-tetrahydro-2H-furo[3,2-c][2]benzopyrans (TFBs), was elucidated.