Henry reaction catalyzed by recyclable [C₄dabco]OH ionic liquid

110-113DABCO-based ionic liquid, 1-butyl-4-aza-1-azaniabicyclo[2.2.2]octane hydroxide, has been used as an efficient catalyst for Henry reaction of various carbonyl compounds with nitroalkanes affording very high yields within a short duration. This method is very simple, clean and avoids hazardous organic solvents. The catalyst can be easily recovered and recycled several times

<span style="font-size:10.0pt;mso-bidi-font-size: 12.0pt;font-family:"Times New Roman","serif";mso-fareast-font-family:"Times New Roman"; mso-bidi-font-family:Mangal;mso-ansi-language:EN-US;mso-fareast-language:EN-US; mso-bidi-language:HI" lang="EN-US">A simple and efficient procedure for the Knoevenagel condensation catalyzed by [MeHMTA]BF₄ ionic liquid</span>

1157-1161<span style="font-size:10.0pt;font-family: " times="" new="" roman","serif";mso-fareast-font-family:"times="" roman";mso-bidi-font-family:="" mangal;letter-spacing:-.3pt;mso-ansi-language:en-us;mso-fareast-language:en-us;="" mso-bidi-language:hi"="" lang="EN-US">Hexamethylenetetramine-based ionic liquid, 1-methylhexamethyl-enetetraminium tetrafluoroborate, has been used as a catalyst for a simple and efficient method for Knoevenagel condensation of active methylene compounds and various carbonyl compounds affording products of very high yields within short duration. This method is very simple, clean and avoids hazardous organic solvents. Most of the products require no further purification. In this process, after stirring for a few minutes, the product is isolated in pure form for both solid and liquid products. The catalyst is easily recovered and can be recycled.</span