Novel Protocol for Synthesis of O,O-Dialkyl Monothiophospharic Acid Sodium Salt

Preparation of O,O-dialkyl monothiophospharic acid sodium salt (DMP-SNa) by addition of sulphur selectively on phosphorous using organic base to form a salt of O,O-dialkyl monothiophospharic acid trialkyl amine salt which is soluble in the non-polar organic solvent and treated with alkali to form O,O-dialkyl monothiophospharic acid sodium salt (DAP-SNa). Trialkylamine becomes free and remains in the nonpolar solvents can be recycled. This synthesis method is effluent free. DOI: http://dx.doi.org/10.17807/orbital.v13i5.159

Novel Protocol for Synthesis of O,O-Dialkyl Monothiophospharic Acid Sodium Salt

Preparation of O,O-dialkyl monothiophospharic acid sodium salt (DMP-SNa) by addition of sulphur selectively on phosphorous using organic base to form a salt of O,O-dialkyl monothiophospharic acid trialkyl amine salt which is soluble in the non-polar organic solvent and treated with alkali to form O,O-dialkyl monothiophospharic acid sodium salt (DAP-SNa). Trialkylamine becomes free and remains in the nonpolar solvents can be recycled. This synthesis method is effluent free. DOI: http://dx.doi.org/10.17807/orbital.v13i5.159

One-pot synthesis of dihydropyrano[2,3-c]pyrazole derivatives using β-cyclodextrin-SO 3 H as a reusable catalyst in aqueous medium

Abstract: We have developed an expedient and highly efficient β-cyclodextrin-SO 3 H catalyzed approach for the eco-friendly synthesis of dihydropyrano[2,3-c]pyrazole derivatives in aqueous medium. The reaction proceeded smoothly with a range of functionalities within 15-30 min to produce the dihydropyrano[2,3-c]pyrazole scaffolds in good to excellent yields. β-cyclodextrin-SO 3 H can be recycled and reused with an insignificant loss of catalytic activity

Tannic Acid an Efficient Catalyst for the Synthesis of 12-aryl-8,9,10,12-tetrahydrobenzo[a]xanthen-11-one Derivatives

Tannic acid explore a highly efficient catalytic activity for the synthesis of 12-aryl-8,9,10,12-tetrahydrobenzo[a]xanthen-11-one derivatives in excellent yields via cyclocondensation of aromatic aldehyde, β-naphthol and dimedone. Catalyst having advantages such as it is cheap and biodegradable and the protocol avoids the use of expensive catalyst and toxic solvent. We believe that this methodology is an efficient, simple, highly yielding, time saving and environmentally friendly. DOI: http://dx.doi.org/10.17807/orbital.v7i2.68