Invented are non-peptide TPO mimetics. Also invented are novel processes and intermediates used in the preparation of the presently invented compounds. Also invented is a method of treating thrombocytopenia, in a mammal, including a human, in need thereof which comprises administering to such mammal an effective amount of a selected hydroxy-
1
-azobenzene derivative.
Hydrogen-Bond-Directed Enantioselective Decarboxylative Mannich Reaction of β-Ketoacids with Ketimines: Application to the Synthesis of Anti-HIV Drug DPC 083
作者:Hai-Na Yuan、Shuai Wang、Jing Nie、Wei Meng、Qingwei Yao、Jun-An Ma
DOI:10.1002/anie.201210361
日期:2013.4.2
Key to success: The title reaction provides facile access to enantioenriched 3,4‐dihydroquinazolin‐2(1H)‐ones containing a quaternary stereogenic center in high yields with excellent enantioselectivities. Subsequent transformations lead to the convenient preparation of the anti‐HIV drug DPC 083 and N‐fused polycyclic compounds without loss of enantiomeric excess.
Base- and metal-free decarboxylative aldol reaction of β-ketoacids with glyoxylate hydrates and glyoxal monohydrates in water
作者:Nan Ren、Jing Nie、Jun-An Ma
DOI:10.1039/c6gc02705a
日期:——
An environmental benign decarboxylative aldol reaction of [small beta]-ketoacids with glyoxylate and glyoxalmonohydrates in water is reported. The reaction proceeds smoothly without any base and metal catalysts, affording the correspoding...
Biomimetic catalytic enantioselective decarboxylative aldol reaction of β-ketoacids with trifluoromethyl ketones
作者:Yan Zheng、Heng-Ying Xiong、Jing Nie、Ming-Qing Hua、Jun-An Ma
DOI:10.1039/c2cc30949a
日期:——
We disclose an organocatalyzed enantioselective decarboxylative ketone aldol reaction of β-ketoacids with trifluoromethyl ketones in the presence of biscinchona alkaloid (DHQD)2AQN, affording chiral tertiary alcohols in up to 98% yield and 90% ee.
Organocatalytic Enantioselective Decarboxylative Michael Addition of β-Keto Acids to Dicyanoolefins and Disulfonylolefins
作者:Yi Wei、Ran Guo、Yanfeng Dang、Jing Nie、Jun-An Ma
DOI:10.1002/adsc.201600485
日期:2016.9.1
A convenient organocatalyticenantioselective decarboxylative Michaeladdition of β‐keto acids to dicyanoolefins and disulfonylolefins is realized. In the presence of saccharide‐derived chiral amino thioureas, the reaction proceeded smoothly to afford a wide range of the Michael adducts in 62–99% yield with 70–94% ee. Moreover, one of the chiral adducts obtained could be readily converted into the