Flexible and Modular Syntheses of Enantiopure 5-cis-Substituted Prolinamines from l-Pyroglutamic Acid
摘要:
A wide range (25 examples) of 5-cis-substituted prolinamines is prepared in five to ten steps starting from cheap L-pyroglutamic acid. Three routes, differing mainly in the order of introduction of the substituents at the 5-cis position, the pyrrolidine nitrogen atom, and the exocyclic amino function, are successfully developed.
Flexible and Modular Syntheses of Enantiopure 5-cis-Substituted Prolinamines from l-Pyroglutamic Acid
摘要:
A wide range (25 examples) of 5-cis-substituted prolinamines is prepared in five to ten steps starting from cheap L-pyroglutamic acid. Three routes, differing mainly in the order of introduction of the substituents at the 5-cis position, the pyrrolidine nitrogen atom, and the exocyclic amino function, are successfully developed.
Discovery, Structure−Activity Relationship, and Pharmacological Evaluation of (5-Substituted-pyrrolidinyl-2-carbonyl)-2-cyanopyrrolidines as Potent Dipeptidyl Peptidase IV Inhibitors
作者:Zhonghua Pei、Xiaofeng Li、Kenton Longenecker、Thomas W. von Geldern、Paul E. Wiedeman、Thomas H. Lubben、Bradley A. Zinker、Kent Stewart、Stephen J. Ballaron、Michael A. Stashko、Amanda K. Mika、David W. A. Beno、Michelle Long、Heidi Wells、Anita J. Kempf-Grote、David J. Madar、Todd S. McDermott、Lakshmi Bhagavatula、Michael G. Fickes、Daisy Pireh、Larry R. Solomon、Marc R. Lake、Rohinton Edalji、Elizabeth H. Fry、Hing L. Sham、James M. Trevillyan
DOI:10.1021/jm051283e
日期:2006.6.1
A series of (5-substituted pyrrolidinyl-2-carbonyl)-2-cyanopyrrolidine (C5-Pro-Pro) analogues was discovered as dipeptidylpeptidaseIV (DPPIV) inhibitors as a potential treatment of diabetes and obesity. X-ray crystallography data show that these inhibitors bind to the catalytic site of DPPIV with the cyano group forming a covalent bond with the serine residue of DPPIV. The C5-substituents make various
Palladium-Catalyzed Enantioselective C(sp<sup>3</sup>)–H Arylation of 2-Propyl Azaaryls Enabled by an Amino Acid Ligand
作者:Hong-Liang Li、Deng-Feng Yang、Hua-Qing Jing、Jon C. Antilla、Yoichiro Kuninobu
DOI:10.1021/acs.orglett.1c04215
日期:2022.2.18
A palladium(II)-catalyzed enantioselective arylation of unbiased secondaryC(sp3)–H bonds was developed. The enantioselectivity was controlled by the combination of a pyridyl or isoquinolinyl directinggroup and an amino acid, N-Boc-2-pentyl proline. A variety of 2-propyl azaaryls and biaryl iodides were employed to provide arylated products in moderate to good yields (up to 82%) with high enantioselectivities