51513-29-2Relevant articles and documents
Identification of N-acyl 4-(3-pyridonyl)phenylalanine derivatives and their orally active prodrug esters as dual acting α4β1 and α4β7 receptor antagonists
Tilley, Jefferson W.,Sidduri, Achyutharao,Lou, Jianping,Kaplan, Gerry,Tare, Nadine,Cavallo, Gary,Frank, Karl,Pamidimukkala, Anjula,Choi, Duk Soon,Gerber, Louise,Railkar, Aruna,Renzetti, Louis
, p. 1036 - 1040 (2013/03/13)
From a series of N-acyl 4-(3-pyridonyl)phenylalanine derivatives of 4, the trifluoromethyl derivative 28 was identified as a potent, dual acting alpha4 integrin antagonist with activity in primate models of allergic asthma. Investigation of a series of prodrug esters led to the discovery of the morpholinopropyl derivative 48 that demonstrated good intestinal fluid stability, solubility and permeability. Compound 48 gave high blood levels of 28 when dosed orally in cynomolgus monkeys. Surprisingly, hydrolysis of 48 was rapid in liver microsomes from the pharmacological species, mouse, rat and monkey, but slow in dog and human; in vivo studies also indicated there was prolonged exposure to unchanged prodrug in dogs.
Odorless thioacetalization reagent 2-[1,3] dithian-2-ylidene-3-oxo- butanamide and its chemoselectivity
Liu, Jun,Liu, Qun,Yu, Haifeng,Ouyang, Yan,Dong, Dewen
, p. 4545 - 4556 (2007/10/03)
2-[1,3]Dithian/dithiolan-2-ylidene-3-oxo-butanamide 2a/2b were synthesized and investigated in the thioacetalization reaction of aldehydes/ketones 3. The experiments revealed that 2a could be used as a nonthiolic, odorless 1,3-propanedithiol equivalent in the conversion of aldehydes/ketones into the corresponding dithianes 4, however, 2b was less effective. Moreover, the chemoselectivity of the thioacetalization of 3 in the presence of 2a is discussed.
Synthesis of 2/6-(polychloromethyl)pyridinecarboxylates
Chupp, John P.,Smith, Lowell R.
, p. 1785 - 1792 (2007/10/02)
Due to their relationship to certain bio-active 2,6-(polyfluoromethyl)-3,5-pyridinedicarboxylates 12, methodology was developed to prepare new, but analogous 2/6 (polychloromethyl)pyridinecarboxylates 6, 9, 10, 13, 18 and 20.Successful methods to prepare these materials include several chlorination procedures, mixed Hantzsch sequences, and aluminium chloride interchanges with 12 and 16.