Cu(I)-Catalyzed Diamination of Conjugated Dienes. Complementary Regioselectivity from Two Distinct Mechanistic Pathways Involving Cu(II) and Cu(III) Species
作者:Baoguo Zhao、Xingao Peng、Yingguang Zhu、Thomas A. Ramirez、Richard G. Cornwall、Yian Shi
DOI:10.1021/ja207691a
日期:2011.12.28
four-membered Cu(III) species A and Cu(II) radical species B, which are in rapid equilibrium. The internal diamination likely proceeds in a concerted manner via Cu(III) species A, and the terminal diamination likely involves Cu(II) radical species B. Kinetic studies have shown that the diamination is first-order in N,N-di-t-butyldiaziridinone (1), zero-order in olefin, and first-order in total Cu(I) catalyst
Complementary Regioselectivity in the Cu(I)-Catalyzed Diamination of Conjugated Dienes To Form Cyclic Sulfamides
作者:Richard G. Cornwall、Baoguo Zhao、Yian Shi
DOI:10.1021/ol102767j
日期:2011.2.4
This paper describes the regioselectivediamination of conjugated dienes using inexpensive Cu(I) as catalyst and N,N-di-tert-butylthiadiaziridine 1,1-dioxide as nitrogen source. The regioselectivity of diamination is likely due to dual mechanistic pathways which are greatly influenced by reaction conditions and the nature of the diene. A variety of useful internal and terminal cyclic sulfamides can
Catalytic Asymmetric Synthesis of Cyclic Sulfamides from Conjugated Dienes
作者:Richard G. Cornwall、Baoguo Zhao、Yian Shi
DOI:10.1021/ol303469a
日期:2013.2.15
This paper describes the catalytic asymmetric diamination of alkyl dienesusing N,N′-di-tert-butylthiadiaziridine 1,1-dioxide in the presence of Pd(0) and a chiral phosphoramidite ligand to give cyclic sulfamides in high yield and high ee. The diamination is also amenable to gram scale.
本文描述了在 Pd(0) 和手性亚磷酰胺配体存在下使用N , N '-二叔丁基噻二氮丙啶 1,1-二氧化物催化不对称二烯二胺化,以高产率和高 ee 得到环状磺酰胺。该二胺化也适合克级规模。