(R)-N-(bis(4-methoxyphenyl)(phenyl)methyl)-5-(5-(diphenylmethyleneamino)-2-fluorophenyl)-6,6-difluoro-5-methyl-2,5,6,7-tetrahydro-1,4-oxazepin-3-amine → (R)-5-(5-amino-2-fluorophenyl)-6,6-difluoro-5-methyl-2,5,6,7-tetrahydro-1,4-oxazepin-3-amine

To a solution of crude (R)-N-(bis(4-methoxyphenyl)(phenyl)methyl)-5-(5-(diphenylmethyleneamino)-2-fluorophenyl)-6,6-difluoro-5-methyl-2,5,6,7-tetrahydro-1,4-oxazepin-3-amine (1.2 mmol) in dichloromethane (20 ml) was added at 22° C. trifuoroacetic acid (2.6 ml) and stirring was continued for 1 h. The mixture was diluted with 1,4-dioxane (40 ml) and aqueous hydrochloric acid (1 M, 33 ml) and vigorous stirring of the emulsion at 22° C. was continued for 16 h. The mixture was evaporated and the residue partitioned between saturated aqueous NaCl and ethyl acetate, the aqueous layer was separated, the pH was adjusted to 14 using saturated aqueous Na2CO3 solution and extracted with ethyl acetate. The organic layer was dried, evaporated and the residue purified by chromatography on silica-NH2 using dichloromethane to give (R)-5-(5-amino-2-fluorophenyl)-6,6-difluoro-5-methyl-2,5,6,7-tetrahydro-1,4-oxazepin-3-amine as a colorless oil. MS (ISP): m/z=274.3 [M+H]+.

1. stirringvigorous stirring of the emulsion at 22° C.
2. waitwas continued for 16 h
3. customThe mixture was evaporated
4. customthe residue partitioned between saturated aqueous NaCl and ethyl acetate
5. customthe aqueous layer was separated
6. extractionextracted with ethyl acetate
7. customThe organic layer was dried
8. customevaporated
9. customthe residue purified by chromatography on silica-NH2

ORDレコード

ord-6b68b95dbc0c44cc88b39daa7aee3199

出典データセット

uspto-grants-2014_03

DOI

10.6084/m9.figshare.5104873.v1

特許番号

US08673894B2