Processes of enantioselectively forming an aminoxy compound and an 1,2-oxazine compound
Abstract
Disclosed is a process of enantioselectively forming an aminoxy compound of Formula (3) In formula (3) R 1 is one of an aliphatic group and an alicyclic group. R 2 is one of hydrogen, an aliphatic group, an alicyclic group, an aromatic group, an arylaliphatic group and an arylalicyclic group. R 3 is one of hydrogen, halogen, hydroxyl, and an aliphatic group with a main chain having 1 to about 10 carbon atoms. The respective aliphatic, alicyclic, aromatic, arylaliphatic or arylalicyclic groups of R 1 , R 2 , and R 3 comprise 0 to about 3 heteroatoms independently selected from the group consisting of N, O, S, Se and Si. The process includes contacting a carbonyl compound of Formula (1) and a nitroso compound of Formula (2) in the presence of a chiral catalyst. The chiral catalyst is a compound of Formula (IX)
Claims
exact text as granted — not AI-modified1 - 12 . (canceled)
13 . A process of enantioselectively forming an 1,2-oxazine compound of Formula (13)
wherein R 2 is one of hydrogen, an aliphatic group, and an alicyclic group, comprising 0 to about 3 heteroatoms independently selected from the group consisting of N, O, S, Se and Si,
R 3 is one of hydrogen, halogen, OR 6 , an aliphatic group with a main chain having 1 to about 10 carbon atoms and 0 to about 3 heteroatoms independently selected from the group consisting of N, O, S, Se and Si, and
R 8 is one of hydrogen, NO 2 , CN, C(R 40 )O, COOR 40 , and CONR 40 R 41 , an aliphatic group, an alicyclic group, an aromatic group, an arylaliphatic group and an arylalicyclic group, comprising 0 to about 3 heteroatoms independently selected from the group consisting of N, O, S, Se and Si,
wherein R 40 and R 41 are independent from one another one of hydrogen, an aliphatic group, an alicyclic group, an aromatic group, an arylaliphatic group and an arylalicyclic group, comprising 0 to about 3 heteroatoms independently selected from the group consisting of N, O, S, Se and Si, and
Z is one of NO 2 , CN, C(R 42 )O, COOR 42 , and CONR 42 R 43 , wherein R 42 and R 43 are independent from one another one of hydrogen, an aliphatic group, an alicyclic group, an aromatic group, an arylaliphatic group and an arylalicyclic group, comprising 0 to about 3 heteroatoms independently selected from the group consisting of N, O, S, Se and Si,
the process comprising contacting a carbonyl compound of Formula (11)
and a nitroso compound of Formula (2)
in the presence of a chiral catalyst, the catalyst being a compound of Formula (IX)
wherein R 4 and R 5 are independently one of COOH and
Y is one of CHOH, O, S, Se, CH 2 , CHOH, CHSH and CHSeH,
thereby forming a reaction mixture, and
allowing the carbonyl compound of Formula (1) and the nitroso compound of Formula (2) to react in the reaction mixture, thereby allowing the formation of the 1,2-oxazine compound of Formula (13).
14 . The process of claim 13 , wherein the carbonyl compound of Formula (1) and the nitroso compound of Formula (2) are allowed to react at a temperature below 25° C.
15 . The process of claim 14 , wherein the temperature is selected in the range from about −80° C. to about 0° C.
16 . The process of claim 13 , wherein the carbonyl compound of Formula (1) and the nitroso compound of Formula (II) are allowed to react for a period of time selected in the range from about 15 minutes to about 48 hours.
17 . The process of claim 13 , wherein the reaction mixture is formed in a dipolar aprotic solvent.Cited by (0)
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