Asymmetric allylation of sulfonyl imines catalyzed by in situ generated Cu(<scp>ii</scp>) complexes of chiral amino alcohol based Schiff bases
作者:Debashis Ghosh、Prasanta Kumar Bera、Manish Kumar、Sayed H. R. Abdi、Noor-ul H. Khan、Rukhsana I. Kureshy、Hari C. Bajaj
DOI:10.1039/c4ra10929e
日期:——
We have developed a catalytic route for enantioselective synthesis of homoallyl amines through Cu(ii)-Schiff base catalyzed allylation of aryl N-sulfonylimines.
A palladium-catalyzedasymmetric umpolung allylation reaction of imines with allylicalcohols has been developed. In the presence of chiral spiro phosphoramidite ligand 4, the allylation was accomplished with high yields and good enantioselectivities. The use of highly stable and easily available allylicalcohols instead of allylic metal reagents facilitated the preparation of chiral homoallylic amines
Chiral Amino Alcohol Derived Bis-phosphoramidite Pincer Palladium Complexes and Their Applications in Asymmetric Allylation of Aldimines
作者:Jie Li、Martin Lutz、Anthony L. Spek、Gerard P. M. van Klink、Gerard van Koten、Robertus J. M. Klein Gebbink
DOI:10.1021/om100021p
日期:2010.3.22
arene ligands and their corresponding metal complexes. The molecularstructure of the new indolinemethanol-derived phosphoramidite pincer metal complex screens quadrants I and III, which is in contrast to the previously reported l-proline-derived P-chiral ligands that screen quadrants II and IV. The bis-phosphoramidite pincer palladium complexes 1 and 2 are active catalysts for asymmetric homoallylation
Highly Enantioselective Synthesis of Sultams via Pd-Catalyzed Hydrogenation
作者:Chang-Bin Yu、Da-Wei Wang、Yong-Gui Zhou
DOI:10.1021/jo900790k
日期:2009.8.7
Using pd(cf3co2)2/(S,S)-f-Binaphane as the catalyst, an efficient enantioselective synthesis of sultams was developed via asymmetric hydrogenation of the corresponding cyclic imines with high enantioselectivities. The hydrogenation products can be conveniently transformed to chiral homoallylic amines without loss of enantioselectivity.
以pd(cf 3 co 2)2 /(S,S)-f-Binaphane为催化剂,通过高对映选择性的相应环状亚胺的不对称加氢反应,开发了有效的对映异构体。氢化产物可以方便地转化为手性均烯丙基胺,而不会损失对映选择性。