22160-13-0Relevant articles and documents
Kinetic Resolution of 2-Substituted Indolines by N-Sulfonylation using an Atropisomeric 4-DMAP-N-oxide Organocatalyst
Murray, James I.,Flodén, Nils J.,Bauer, Adriano,Fessner, Nico D.,Dunklemann, Daniel L.,Bob-Egbe, Opetoritse,Rzepa, Henry S.,Bürgi, Thomas,Richardson, Jeffery,Spivey, Alan C.
supporting information, p. 5760 - 5764 (2017/05/12)
The first catalytic kinetic resolution by N-sulfonylation is described. 2-Substituted indolines are resolved (s=2.6–19) using an atropisomeric 4-dimethylaminopyridine-N-oxide (4-DMAP-N-oxide) organocatalyst. Use of 2-isopropyl-4-nitrophenylsulfonyl chloride is critical to the stereodiscrimination and enables facile deprotection of the sulfonamide products with thioglycolic acid. A qualitative model that accounts for the stereodiscrimination is proposed.
Acylative kinetic resolution of racemic heterocyclic amines with (R)-2-phenoxypropionyl chloride
Vakarov, Sergey A.,Gruzdev, Dmitry A.,Chulakov, Evgeny N.,Sadretdinova, Liliya Sh.,Tumashov, Andrey A.,Pervova, Marina G.,Ezhikova, Marina A.,Kodess, Mikhail I.,Levit, Galina L.,Krasnov, Victor P.,Charushin, Valery N.
supporting information, p. 1231 - 1237 (2016/11/23)
The acylative kinetic resolution of racemic heterocyclic amines such as 3,4-dihydro-3-methyl-2H-[1,4]benzoxazines, 3,4-dihydro-3-methyl-2H-[1,4]benzothiazine, 2-methyl-1,2,3,4-tetrahydro-quinolines and 2-methylindoline with enantiopure (R)-2-phenoxypropionyl chloride has been studied. It has been found that acylation of 3,4-dihydro-3-methyl-2H-[1,4]benzothiazine proceeds with the best stereoselectively when compared with other racemic amines. An efficient method for the preparation of (S)-3,4-dihydro-3-methyl-2H-[1,4]benzothiazine (99.4% ee) via a kinetic resolution protocol was developed. The possibility of recycling (R)-2-phenoxypropionic acid has been demonstrated.
Iridium-catalyzed asymmetric hydrogenation of N-protected indoles
Baeza, Alejandro,Pfaltz, Andreas
supporting information; scheme or table, p. 2036 - 2039 (2010/07/05)
Chiral indolines substituted at C-2 or C-3 can be prepared in high yield and excellent enantioselectivity by asymmetric hydrogenation of N-protected indoles by using Ir catalysts with chiral N,P ligands. With less reactive substrates, the reaction had to
Kinetic resolution of (±)-2,3-dihydro-3-methyl-4H-1,4-benzoxazine, (±)-2-methyl-1,2,3,4-tetrahydroquinoline and (±)-2-methylindoline using N-tosyl-(S)-prolyl chloride
Krasnov, Victor P.,Levit, Galina L.,Bukrina, Iraida M.,Andreeva, Irina N.,Sadretdinova, Liliya Sh.,Korolyova, Marina A.,Kodess, Mikhail I.,Charushin, Valery N.,Chupakhin, Oleg N.
, p. 1985 - 1988 (2007/10/03)
Acylation of racemic 2,3-dihydro-3-methyl-4H-1,4-benzoxazine, 2-methyl-1,2,3,4-tetrahydroquinoline and 2-methylindoline with N-tosyl-(S)-prolyl chloride resulted in their kinetic resolution with the predominant formation of (R,S)-diastereoisomeric amides,