Quinine-thiourea catalyzed enantioselective hydrophosphonylation of trifluoromethyl 2(1H)-quinazolinones
作者:Hexin Xie、Aiguo Song、Xinshuai Zhang、Xiaobei Chen、Hao Li、Chunquan Sheng、Wei Wang
DOI:10.1039/c2cc38097h
日期:——
An organocatalytic enantioselective addition reaction of cyclic ketoimines with phosphites has been developed for the first time. The process, catalyzed by Soós' quinine thiourea, affords synthetically and medicinally interesting enantioenriched trifluoromethyl dihydroquinazolinones in high yields and with high enantioselectivities.
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.
Highly Enantioselective Decarboxylative Mannich Reaction of Malonic Acid Half Oxyesters with Cyclic Trifluoromethyl Ketimines: Synthesis of β-Amino Esters and Anti-HIV Drug DPC 083
作者:Hai-Na Yuan、Shen Li、Jing Nie、Yan Zheng、Jun-An Ma
DOI:10.1002/chem.201303307
日期:2013.11.18
An organocatalyticenantioselectivedecarboxylative Mannich reaction of malonicacidhalf oxyesters with cyclic ketimines was developed for the preparation of enantioenriched β‐amino esters with a quaternary stereogenic center and the anti‐HIV drug DPC 083 (see scheme).
Zinc-mediated enantioselective addition of terminal 3-en-1-ynes to cyclic trifluoromethyl ketimines
作者:Yue Zhang、Jing Nie、Fa-Guang Zhang、Jun-An Ma
DOI:10.1016/j.jfluchem.2018.01.008
日期:2018.4
A facile enantioselectiveaddition of terminal 3-en-1-ynes to cyclic N-acyl trifluoromethyl ketimines is reported. In the presence of Zinc/BINOL complexes, a series of enynylated tertiary carbinamines were readily obtained in 90–97% yield with 70–97% enantiomeric excess in a single chemical operation under mild reaction conditions.
Bisphosphine-Triggered One-Pot Sequential [3 + 2]/[3 + 2] Annulation of Allenoates with Cyclic Ketimines
作者:Li-Jun Yang、Shuai Wang、Jing Nie、Shen Li、Jun-An Ma
DOI:10.1021/ol402364t
日期:2013.10.18
bisphosphine-triggered one-potsequential [3 + 2]/[3 + 2] annulation of allenoates with cyclic ketimines was developed, in which the product of the first [3 + 2] annulation is the electron-deficient substrate for the second [3 + 2] annulation reaction. The reaction is exceptionally regioselective and diastereoselective. This novel and highly convergent strategy may open up a new viewpoint in utilizing allenoates to prepare