An efficient and convenient procedure for the preparation of 1,1-diacetates from aldehydes catalyzed by H2NSO3H

Effiecient, Eco-Friendly Sulfamic Acid Catalyzed Synthesis of Bis(6-Aminouracil-5-Yl)methane at Room Temperature

“…Sulfamic acid an easily available, inexpensive and environmental benign substance and it used as an organo-catalyst in many organic transformations. Such as acetylation 15 , esterification of cyclic olefins with aliphatic acids 16 , acetylation of alcohols and phenols 17 , Biginelli condensation 18 , trans esterification of β-ketoesters 19 , Beckmann rearrangement 20 , Diels-Alder reactions 21 , Pechmann condensation 22 , Mannich reaction 23 , Hantzsch reaction 24 and Michael reaction 25 . It is an inexpensive, non-hygroscopic, non-corrosive, recyclable and highly effective green catalyst used in various organic transformations.…”

Sulfamic Acid Catalyzed Five Component Reaction for Efficient and One-Pot Synthesis of Densely Functionalized Tetrahydropyridine Scaffold

“…Sulfamic acid (H 2 NSO 3 H) has come out as a green heterogeneous catalyst for the acid catalyzed reactions like functional group protection and deprotection, 25 inter and intra-molecular imino Diels-Alder reaction, 26 Pechmann condensation, 27 Biginelli condensation, 28 Beckmann rearrangement, 29 etc. It is comparatively economic, dry, non-volatile, non hygroscopic, noncorrosive, odorless solid crystalline catalyst.…”

Sulfamic Acid: A Very Useful Catalyst

“…It is commercially available and is inexpensive. Recently, SA emerged as a promising solid-acid catalyst for acidcatalyzed reactions, such as functional group protections and deprotections, [2][3][4] and the synthesis of isoamyl acetate 5 and polymeric ethers. 6 Moreover, some important organic transformations, including Beckmann rearrangement, 7 inter-and intramolecular imino Diels-Alder reactions, 8 and Pechmann 9 and Biginelli condensations, 10,11 have also been performed successfully in the presence of sulfamic acid.…”