22608-86-2Relevant articles and documents
Cationic Iridium-Catalyzed Asymmetric Decarbonylative Aryl Addition of Aromatic Aldehydes to Bicyclic Alkenes
Nonami, Reina,Morimoto, Yusei,Kanemoto, Kazuya,Yamamoto, Yasunori,Shirai, Tomohiko
, (2022/02/05)
We report an unprecedented catalytic protocol for the enantioselective decarbonylative transformation of aryl aldehydes. In this process, the decarbonylation of aldehydes catalyzed by chiral iridium complexes enabled the formation of asymmetric C?C bonds
Furan ring opening-indole ring closure: Synthesis of furo[2′, 3′:3,4]-cycloheota[1,2-b]indolium chlorides
Butin, Alexander V.,Smirnov, Sergey K.,Stroganova, Tatyana A.
, p. 623 - 628 (2007/10/03)
A new synthetic approach to furo[2′,3′:3,4]cyclohepta[1,2-b] indolium chlorides is elaborated starting from 2-acetylaminoaryldifurylmethanes or 2-aminoaryldifurylmethanes under treatment with methanolic HCl solution. The reaction proceeds in three steps: recyclization, intramolecular cyclization, and disproportionation. In this case the furan ring takes part in building up both pyrrole and seven-membered rings. The same salts can be obtained directly from 2-acetylaminobenzaldehydes and 2-methylfuran under similar conditions without isolation of corresponding 2-acetylaminoaryldifurylmethanes.
Electron Deficient Heteroaromatic Ammonioamidates. Part 26. N-(Quinazolin-3-io)amidates. Part 13. Phototransformations of an N-(Quinazolin-3-io)thioamidate and of a 10bH-1,3,4-thiadiazoloquinazoline, the Ring Isomer of an N-(Quinazolin-3-io)thioamidate, and the Photochemical Fo
Lempert-Sreter, Magda,Lempert, Karoly,Moeller, Joergen
, p. 1143 - 1152 (2007/10/02)
Irradiation of the N-(quinazolin-3-io)thioamidate (10a) in ethanol and butylamine solution furnished, in addition to several other compounds, the 4,4'-biquinazolinyl (12a), the quinazolinyl alcohol (13a) and the quinazolinyl ketone (13b), respectively, the mesoionic triazoloquinazolinylium thiolate (18a) and the corresponding olate (18b) as novel type photolysis products.In contrast, irradiation of the 10bH-1,3,4-thiadiazoloquinazoline (11b), the ring isomer of the N-(quinazolin-3-io)thioamidate (10b) furnishes, with cleavage of either the quinazoline or the thiadiazole ring , a mixture of the thiadiazoles (21a,b), and the quinazoline derivatives (14a), (22a,b) in addition to 3,4-dimethoxybenzonitrile.Irradiation of various sulphur-containing quinazoline derivatives, including the quinazolinethiones (14a,e), the methylthioquinazoline (13f) and the diquinazolinyl disulphide (24a), leads to the formation of 4,4'-biquinazolinyls (12a) and (12b), respectively.Irradiation of the quinazoline (13c), which carries no sulphur-containing substituent, does not lead to the formation of the biquinazolinyl (12a); irradiation of a mixture of quinazoline (13e) and quinazolinethione (14a) gives rise to the formation of a mixture of biquinazolinyls (12a-c) with incorporation of the ring of the sulphur-free starting quinazoline (13e) into the products (12a) and (12b).