596817-05-9Relevant academic research and scientific papers
4-fluoropyrrolidine-2-carbonyl fluorides: Useful synthons and their facile preparation with 4-tert-butyl-2,6-dimethylphenylsulfur trifluoride
Singh, Rajendra P.,Umemoto, Teruo
, p. 3113 - 3121 (2011/06/21)
4-Fluoropyrrolidine derivatives are useful in medicinal chemistry applications such as dipeptidyl peptidase IV inhibitors. As attractive synthons for these, N-protected (2S,4S)-4-fluoropyrrolidine-2-carbonyl fluorides were synthesized in high yield by double fluorination of N-protected (2S,4R)-4-hydroxyproline with 4-tert-butyl-2,6-dimethylphenylsulfur trifluoride (Fluolead). The 4-fluoropyrrolidine-2-carbonyl fluorides were converted to useful intermediates such as 4-fluoropyrrolidine-2-carboxamides, -N-methoxy-N-methylcarboxamide (Weinreb amide), -carboxylate methyl esters, and -carbonitriles in excellent yields. The crystalline N-Fmoc-cis-4- fluoropyrrolidine-2-carbonyl fluoride 2a is a particularly useful synthon due to its high yield of preparation and easy isolation as an enantiomerically pure compound by crystallization. Thus, the methodology using the synthons prepared by the stereospecific double fluorination has enabled a significant decrease in the synthetic steps needed for the preparation of the 4-fluoropyrrolidine derivatives useful for medicinal applications.
NOVEL 4-FLUOROPYRROLIDINE-2-CARBONYL FLUORIDE COMPOUNDS AND THEIR PREPARATIVE METHODS
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Page/Page column 34-35, (2010/08/04)
Novel 4-fluoropyrrolidine-2-carbonyl fluoride compounds as useful fluorinated intermediates are disclosed. Their preparative methods are also disclosed. Useful applications of the 4-fluoropyrrolidine-2-carbonyl fluorides are shown.
NOVEL DIPEPTIDYL PEPTIDASE INHIBITORS AND PROCESSES FOR THEIR PREPARATION AND PHARMACEUTICAL COMPOSITIONS CONTAINING THEM
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Page/Page column 62-63, (2008/06/13)
The present invention relates to novel compounds representated by formula (I), where R, R1, R2, R3, X, Y, m, n are as defined.The present invention relates to compounds of the general formula I their derivatives, their analogs, their tautomeric forms, their stereoisomers, their diastereomers, their bioisosteres, their polymorphs, their pharmaceutically acceptable salts and pharmaceutically acceptable compositions containing them which are predominantly dipeptidyl peptidase IV inhibitors. The present invention also relates to the processes for the preparation of novel compounds of formula (I) and their use in treating type II diabetes and diabetic complications thereof and also for treating dislipidemia, hypercholesterolemia, obesity and hyperglycemia.
2-CYANOPYRROLIDINECARBOXAMIDE COMPOUND
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Page/Page column 57-58, (2008/06/13)
A compound of the formula (I) or a pharmaceutically acceptable salt thereof: [wherein X1 and X2 each is independently lower alkylene; X3 is =CH2, =CHF or =CF2; R1 is substituent, R2 and R3 each is independently H or lower alkyl; n is 0, 1, 2, 3 or 4.] having the activity inhibiting DPP-IV activity. They are therefore useful in the treatment of conditions mediated by DPP-IV, such as NIDDM.
2-CYANOPYRROLIDINE DERIVATIVES AND THEIR USE AS DPP-IV INHIBITORS
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Page 25-26, (2010/02/09)
A compound of the formula (I) or a pharmaceutically acceptable salt thereof: [wherein X is CFH, or CF?2#191, R?1? is the moiety represented by the formula: [wherein R?2? is (lower) alkyl, R?3? is phenyl-(lower)alkyl, and the like.], and the like.] Compounds of formula (I) inhibit DPP-IV activity. They are therefore useful in the treatment of conditions mediated by DPP-IV, such as NIDDM.
NEW COMPOUNDS
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Page/Page column 19, (2008/06/13)
The present invention relates to new, potent DPP-IV enzyme inhibitors of the general formula (I), which contain fluorine atoms.
