Li-Bin Liu

Clean, one-pot synthesis of naphthopyran derivatives in aqueous media

Abstract A general and practical one‐pot synthesis of naphthopyran derivatives using hexadecyltrimethylammonium bromide (HTMAB) as catalyst (10 mol%) is described. This method provides several advantages such as neutral conditions, high yields and simple workup procedure. The catalyst is low cost, facile, active, environmentally friendly, and reusable. In addition, water is chosen as a green solvent.

A clean one-pot synthesis of 7-amino-5-aryl-6-cyano-1,5-dihydro-2h-pyrano[2,3-d] pyrimidine-2,4(3H)-diones in aqueous media under ultrasonic irradiation

A novel approach to the synthesis of 7-amino-5-aryl-6-cyano-1,5-dihydro-2H-pyrano[2,3-d]pyrimidine-2,4(3H)-diones in aqueous media under ultrasonic irradiation without catalyst is described. This method provides several advantages such as being environmentally friendly, simple work-up procedure and milder condition. In addition, water was chosen as a green solvent.

Clean, One‐Pot Synthesis of 4H‐Pyran Derivatives Catalyzed by Hexadecyltrimethyl Ammonium Bromide in Aqueous Media

Abstract An efficient and convenient synthetic route to 4H‐pyran derivatives in water in the presence of hexadecyltrimethyl ammonium bromide (HTMAB) as catalyst is described. This method provides several advantages such as environment friendliness, high yields, and a simple workup procedure. In addition, water was chosen as a green solvent.

Rapid and Efficient Method for Acetylation of Alcohols and Phenols with Acetic Anhydride Catalyzed by Silica Sulfate

Abstract A rapid and efficient method is described for acetylation of a series of alcohols and phenols with acetic anhydride catalyzed by silica sulfate solid acid at room temperature or at refluxing temperature in excellent yield.

Efficient and Convenient Procedure for Preparation of N‐Sulfonylimines Catalyzed by Montmorillonite K‐10

Abstract A general and practical chemical route to the synthesis of N‐sulfonylimines using montmorillonite K‐10 as the catalyst is described. This method provides several advantages such as operational simplicity, short reaction time, using of inexpensive materials, noncorrosivity, lack of pollution, and high yields.

Clean Synthesis of Compounds Containing Two 4H‐Pyrans or Two Tetraketones in Aqueous Media

Abstract A general and practical chemistry route to the synthesis of compounds containing two 4H‐pyrans or two tetraketones in aqueous media is described. This method provides several advantages such as neutral conditions, high yields, and simple workup procedure. In addition, water was chosen as a green solvent.

Silica Sulfate, an Efficient Catalyst for the Trimethylsilylation of Alcohols

Abstract An easy method for the preparation of trimethylsilyl ethers from alcohols and 1,1,1,3,3,3‐hexamethyl‐disilazane (HMDS) using silica sulfate as a catalyst under mild conditions in excellent yields is described.

Clean synthesis of ethyl α-cyanocinnamates catalysed by hexadecyltrimethyl ammonium bromide in aqueous media

An efficient and convenient approach to the synthesis of ethyl α-cyanocinnamates in water using hexadecyltrimethyl ammonium bromide (HTMAB) as the phase-transfer catalyst (10 mol %) is described. This method provides several advantages such as neutral conditions, high yields and simple work-up procedure.

A rapid and efficient procedure for deprotection of 1,1-diacetates catalysed by silica sulfate

An efficient procedure for converting a number of 1,1-diacetates into the corresponding aldehydes was developed with silica sulfate as catalyst. The advantages of this procedure is its brevity, and high yield. It is environmentally friendly and the catalyst is also inexpensive and reusable.