A Photocatalytic Regioselective Direct Hydroaminoalkylation of Aryl-Substituted Alkenes with Amines
作者:Natalia A. Larionova、Jun Miyatake Ondozabal、Emily G. Smith、Xacobe C. Cambeiro
DOI:10.1021/acs.orglett.1c01715
日期:2021.7.16
hydroaminoalkylation of cinnamate esters has been developed. The reaction involves the regioselective addition of α-aminoalkyl radicals generated from aniline derivatives or aliphatic amines to the α-position of unsaturated esters. The scope of aromatic alkenes was extended to styrenes undergoing hydroaminoalkylation with anti-Markovnikov selectivity, which confirms the importance of the aromatic group
Functional Isotactic Polypropylenes via Efficient Direct Copolymerizations of Propylene with Various Amino-Functionalized α-Olefins
作者:Ruining Shang、Huan Gao、Faliang Luo、Yulian Li、Bin Wang、Zhe Ma、Li Pan、Yuesheng Li
DOI:10.1021/acs.macromol.9b00757
日期:2019.12.10
A series of novel amino-containing isotacticpolypropylenes with high molecularweight and satisfying functional comonomer incorporation were synthesized via direct copolymerization of propylene and α-olefin containing bulky groups protected amino. The highly efficient postmetallocene catalyst system, (pyridylamido)Hf/[Ph3C][B(C6F5)4]/AliBu3, exhibited overwhelmingly favorable reactivity toward α-olefin
通过丙烯与含大基团保护的氨基的α-烯烃的直接共聚反应,合成了一系列具有高分子量和令人满意的功能性共聚单体掺入的新型含氨基等规聚丙烯。高效的后茂金属催化剂体系(pyridylamido)Hf / [Ph 3 C] [B(C 6 F 5)4 ] / Al i Bu 3,与氨基烯烃部分相比,对α-烯烃的反应性极好,有效地促进了共聚丙烯与5-(N,N-二异丙氨基)-1-戊烯,5-(N,N-二苯基氨基)-1-戊烯和4-(7-辛烯-1-基)-N,N-二苯基苯胺分别在温和的反应条件下实现了很高的催化活性(高达7.44×10 6 g聚合物mol Cat。–1 h –1)。证明所获得的功能共聚物显示出高分子量(至多5.90×10 5),氨基烯烃共聚单体的掺入(至多11.6mol%)和立构规整度([mmmm]> 99%)。此外,大多数共聚物表现出高熔点和热稳定性(T d在450°C左右)。代表性物理性能,如U
Functionalized aluminum reagents
申请人:The Goodyear Tire & Rubber Company
公开号:US10711016B1
公开(公告)日:2020-07-14
The invention is directed to functionalized aluminum reagents of formula 1
where R is a linear or branched alkane group containing 1 to 8 carbon atoms, and R1 is phenylene, or a linear or branched alkane diyl group containing 2 to 10 carbon atoms, or a combination of one or more phenylene groups and one or more linear or branched alkane diyl groups containing 1 to 10 carbon atoms; Q is of formula 2
where R3 and R4 are independently phenyl or a linear or branched alkyl group containing 1 to 10 carbon atoms, or R3 and R4 taken together with the nitrogen atom represent a nitrogen containing heterocyclic group containing from 4 to 12 carbon atoms.
NiH-catalyzed Csp3−Csp3 coupling of alkylhalides and alkyl alkenes has been established, providing tunable linear and branched products. Alkylhalides perform dual function as both coupling substrates and hydrogen sources in this reaction. Excellent functional group tolerance and broad substrate scope can be extended to late-stage modification of natural products and drug molecular structures.
Nickel-Catalyzed Enantioconvergent Reductive Hydroalkylation of Unactivated Alkenes with α-Pyridyl Alkyl Electrophiles
作者:Yiting Hao、Xinlin Wang、Yumeng Wu、Liangliang Song、Kui Zhang、Lingchao Cai
DOI:10.1021/acscatal.3c04147
日期:2023.12.1
established via a nickel/Box catalyst with α-pyridyl alkylbromide. The mild reaction conditions enable a remarkably broad substrate scope and good functional-group tolerance, leading to the formation of a variety of enantioenriched alkylated pyridine derivatives in good yields with high enantioselectivities. Further application of enantioenriched pyridine derivatives is demonstrated by an asymmetric Si–H