An unusual synthesis of 3-(2-(arylamino)thiazol-4-yl)-2H-chromen-2-ones from ethyl 2-(chloromethyl)-2-hydroxy-2H-chromene-3-carboxylate via benzopyran ring opening was written by Kavitha, Kotthireddy;Srikrishna, Devulapally;Sridhar, Balasubramanian;Aparna, Pasula. And the article was included in Molecular Diversity in 2019.Category: chlorides-buliding-blocks The following contents are mentioned in the article:
An unusual and unexpected synthesis of 3-(2-(arylamino)thiazol-4-yl)-2H-chromen-2-ones was observed by the reaction of Et 2-(chloromethyl)-2-hydroxy-2H-chromene-3-carboxylate with various arylthioureas in ethanol under mild reaction conditions with excellent yields. The ambiguity in the structure of the obtained products was solved by recording its single-crystal X-ray anal. This protocol was found to be a novel approach for the preparation of title compounds via benzopyran ring opening. A systematic plausible mechanism was proposed for the formation of the product. Also, an efficient one-pot three-component method was demonstrated for the formation of title compounds starting from salicylaldehyde. This study involved multiple reactions and reactants, such as Ethyl 4-chloro-3-oxobutanoate (cas: 638-07-3Category: chlorides-buliding-blocks).
Ethyl 4-chloro-3-oxobutanoate (cas: 638-07-3) belongs to organic chlorides. Organochlorines are organic compounds having multiple chlorine atoms. They were the first synthetic pesticides that were used in agriculture. They are resistant to most microbial and chemical degradations. Aliphatic organochlorides are often alkylating agents as chlorine can act as a leaving group, which can result in cellular damage.Category: chlorides-buliding-blocks
Referemce:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics