Lesaminoalcenes du type CH 2 =CH(CH 2 ) n NH 2 (n=3,4) se cyclisent en pyrrolines-1 ou tetrahydro-3,4,5,6 pyridines dans les conditions du procede Wacker。Lesaminoalcenes avec un groupe amino secondaire donnent les imines cycliquesrespondantes, tandis que les alcenes avec un groupeamino tertiaire donnent desaminocetones
Mild Conditions for Pd-Catalyzed Carboamination of <i>N</i>-Protected Hex-4-enylamines and 1-, 3-, and 4-Substituted Pent-4-enylamines. Scope, Limitations, and Mechanism of Pyrrolidine Formation
作者:Myra Beaudoin Bertrand、Joshua D. Neukom、John P. Wolfe
DOI:10.1021/jo801631v
日期:2008.11.21
with aryl bromides leads to greatly increased tolerance of functional groups and alkene substitution. Substrates derived from (E)- or (Z)-hex-4-enylamines are stereospecifically converted to 2,1'-disubstituted pyrrolidine products that result from suprafacial addition of the nitrogen atom and the aryl group across the alkene. Transformations of 4-substituted pent-4-enylamine derivatives proceed in high
This invention discloses new compounds of the formula ##STR1## wherein R.sup.1 is selected from the group consisting of hydrogen and alkyl; X is halogen; R.sup.2 is selected from the group consisting of alkyl, alkenyl and alkynyl; n is the integer 1 or 2; and R.sup.3, R.sup.4, R.sup.5 and R.sup.6 are each selected from the group consisting of hydrogen and alkyl. Further disclosed are herbicidal compositions utilizing the aforedescribed compounds.
这项发明揭示了新的化合物,其化学式为 ##STR1## 其中 R.sup.1 选自氢和烷基; X 为卤素; R.sup.2 选自烷基、烯基和炔基; n 为整数1或2; 而 R.sup.3、R.sup.4、R.sup.5 和 R.sup.6 各自选自氢和烷基。进一步披露了利用上述化合物的除草剂组合物。
Intermolecular Anti-Markovnikov Hydroamination of Unactivated Alkenes with Sulfonamides Enabled by Proton-Coupled Electron Transfer
作者:Qilei Zhu、David E. Graff、Robert R. Knowles
DOI:10.1021/jacs.7b11144
日期:2018.1.17
Here we report a catalytic method for the intermolecularanti-Markovnikovhydroamination of unactivated alkenes using primary and secondary sulfonamides. These reactions occur at room temperature under visible light irradiation and are jointly catalyzed by an iridium(III) photocatalyst, a dialkyl phosphate base, and a thiol hydrogen atom donor. Reaction outcomes are consistent with the intermediacy
在这里,我们报告了一种使用初级和次级磺酰胺对未活化烯烃进行分子间抗马尔科夫尼科夫加氢胺化的催化方法。这些反应在室温下在可见光照射下发生,并由铱 (III) 光催化剂、磷酸二烷基酯碱和硫醇氢原子供体共同催化。反应结果与通过磺酰胺 NH 键的质子耦合电子转移激活产生的 N 中心磺酰胺自由基的中间体一致。概述了反应的合成范围(> 60 个例子)和机械特征的研究。
Detosylative (Deutero)alkylation of Indoles and Phenols with (Deutero)alkoxides
作者:Ming-Hui Zhu、Cheng-Long Yu、Ya-Lan Feng、Muhammad Usman、Dayou Zhong、Xin Wang、Nasri Nesnas、Wen-Bo Liu
DOI:10.1021/acs.orglett.9b02639
日期:2019.9.6
An efficient strategy for N/O-(deutero)alkylation of indoles and phenols with alkoxides/alcohols as the alkylation reagents is described. The consecutive detosylation/alkylation transformations feature mild reaction conditions, high ipso-selectivity, and good functional group tolerance (>50 examples). A one-pot selective N-alkylation of unprotected indoles with alcohols and TsCl is also realized. The
Organolanthanide-Catalyzed Intramolecular Hydroamination/Cyclization/Bicyclization of Sterically Encumbered Substrates. Scope, Selectivity, and Catalyst Thermal Stability for Amine-Tethered Unactivated 1,2-Disubstituted Alkenes
作者:Jae-Sang Ryu、Tobin J. Marks、Frank E. McDonald
DOI:10.1021/jo035417c
日期:2004.2.1
R* = (−)-menthyl; Ln = Sm, Y), and [Me2Si(η5-Me4C5)(CpR*)]SmN(TMS)2 (Cp = η5-H3C5; R* = (−)-menthyl) mediate asymmetric intramolecular hydroamination/cyclization of amines bearing internal olefins and afford chiral 2-substituted piperidine and pyrrolidine in enantioselectivities as high as 84:16 er at 60 °C. The substrate of the structure NH2CH2CMe2CH2CHCH(CH2)2CHCH2 is regiospecifically bicyclized