METHOD FOR PRODUCING DIPHENYLMETHANE DERIVATIVE
First Claim
1. A method for producing a compound of the following Formula 1a, the method comprising the steps of:
- (1) reacting a compound of the following Formula 2 with a compound of the following Formula 3 and subjecting the resultant to a cyclization reaction, to obtain a compound of the following Formula 4;
(2) subjecting the compound of Formula 4 to aldehydation or amidation, followed by reacting the resultant with a compound of the following Formula 5 and performing reduction, to obtain a compound of the following Formula 6; and
(3) reacting the compound of Formula 6 with a compound of the following Formula 7, and performing deprotection and reduction,
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Abstract
The present invention relates to an improved method for producing a diphenylmethane derivative which is effective as a sodium-dependent glucose cotransporter (SGLT) inhibitor, the method being carried out by means of a convergent synthesis method in which each major group is separately synthesized and then coupled. As such, in comparison to a linear synthesis method disclosed in existing documents, the synthesis pathway is compact and yield can be increased, and risk factors inherent in the linear synthesis pathway can be reduced. Furthermore, the crystal form of the compound produced according to the method has superb physicochemical characteristics, and thus can be effectively utilized in fields such as pharmaceutical manufacturing.
2 Citations
21 Claims
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1. A method for producing a compound of the following Formula 1a, the method comprising the steps of:
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(1) reacting a compound of the following Formula 2 with a compound of the following Formula 3 and subjecting the resultant to a cyclization reaction, to obtain a compound of the following Formula 4; (2) subjecting the compound of Formula 4 to aldehydation or amidation, followed by reacting the resultant with a compound of the following Formula 5 and performing reduction, to obtain a compound of the following Formula 6; and (3) reacting the compound of Formula 6 with a compound of the following Formula 7, and performing deprotection and reduction, - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 21)
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15. A method for producing a compound of the following Formula 1b, the method comprising the steps of:
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(1) reacting a compound of the following Formula 2 with a compound of the following Formula 3 and subjecting the resultant to a cyclization reaction, to obtain a compound of the following Formula 4; (2) subjecting the compound of Formula 4 to aldehydation or amidation, followed by reacting the resultant with the compound of Formula 5 and performing reduction, to obtain a compound of the following Formula 6; (3) reacting the compound of Formula 6 with a compound of the following Formula 8 and then performing reduction, to obtain a compound of the following Formula 9; (4) forming a furanose ring of the compound of Formula 9 into a pyranose ring under an acidic condition and then introducing a protecting group thereinto, to obtain a compound of the following Formula 10; and (5) treating the compound of Formula 10 with thiourea, reacting the resultant with C1-7 alkyl halide, and then performing reduction,
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- 16. A crystalline form of a compound of the following Formula c28.
Specification