Rapid construction of tetrahydropyridine scaffolds <i>via</i> formal imino Diels–Alder reactions of Schiff bases and Nazarov reagents
作者:Yen-Ku Wu、Viresh H. Rawal
DOI:10.1039/c9ob01880h
日期:——
Described is a one-flask, two-step method for the synthesis of highly functionalized piperidines. The process involves formal [4 + 2] cycloadditions of Schiffbases and Nazarov reagents, followed by facile elaborations of the initial cycloadducts. Notably, these aza-annulations are facilitated by protic solvents and proceed smoothly under ambient conditions, without other additives. The synthetic utility
Pd-catalyzed asymmetric allylic alkylations via C–H activation of N-allyl imines with glycinates
作者:Barry M. Trost、Xiaoxun Li
DOI:10.1039/c7sc02899g
日期:——
Herein is reported the first example of palladium-catalyzedasymmetricallylic alkylation (AAA) reactions involving 2-aza-π-allyl palladium intermediates. The 2-aza-π-allyl complex was generated via a novel mode of activation of N-allyl imines. Pd-catalyzed C(sp3)–H activation of N-allyl imines and subsequent nucleophilic attack by glycinates delivered vicinal diamino derivatives as the sole regioisomers
Selective hydrosilylation of N-allylimines using a (3-iminophosphine)palladium precatalyst
作者:Hosein Tafazolian、Joseph A. R. Schmidt
DOI:10.1039/c5cy01859e
日期:——
Hydrosilylation utilizing a (3-iminophosphine)palladium catalyst leads to the selective reduction of the imine unit of allylimines.
利用(3-亚磷腙基)钯催化剂进行氢硅烷基化反应,可以选择性地还原烯丙基亚胺中的亚胺基团。
Synthesis of organophosphorus compounds via silyl esters of phosphorous acids
作者:Kamyar Afarinkia、Charles W. Rees、John I.G. Cadogan
DOI:10.1016/s0040-4020(01)87899-6
日期:1990.1
The addition of trimethylsilyloxy phosphorus (III)derivatives generated in situ to imines at room temperature provides a mild selective and high yielding route to α-aminoalkylphosphorate and α-aminoalkylphenylphosphinate esters. Isocyanates and carbodiimides react similarly to give phosphonoureas and phosphonoguarnidines respectively aldehydes and ketones are much less reactive and cyanides are inert
Nickel(II) Catalyzed Hydroboration: A Route to Selective Reduction of Aldehydes and
<i>N</i>
‐Allylimines
作者:Istiak Hossain、Joseph A. R. Schmidt
DOI:10.1002/ejic.202000092
日期:2020.5.22
[(iminophosphine)nickel(allyl)]+ complex was found to be sufficiently electrophilic to activate aldehydes and N‐allylimines to undergo hydroboration with pinacolborane (HBpin) under mild reaction conditions. The catalyst displayed excellent selectivity toward aldehydes in the presence of ketones. A wide variety of functional groups were tolerated, including halogens, NO2, CN, OMe, and alkenes for both aldehydes