In Situ Formation of Allyl Ketones via Hiyama−Nozaki Reactions Followed by a Chromium-Mediated Oppenauer Oxidation
作者:Henri S. Schrekker、Martin W. G. de Bolster、Romano V. A. Orru、Ludger A. Wessjohann
DOI:10.1021/jo001750u
日期:2002.4.1
dependent on the substitution pattern of the reaction partners and the reaction conditions. An appropriate choice of these can lead to preferential formation of ketones instead of the alcohols. In addition to its synthetic usefulness, the oxidation-reduction equilibrium is of the utmost importance for the design of enantioselective Hiyama-Nozaki reactions because it is also a potential racemization pathway
A new combination of organic reductant, tetrakis(dimethylamino)ethylene, and transition metal catalysts if reported for allylation of aldehydes and ketones.
报道了一种新的有机还原剂、四(二甲氨基)乙烯与过渡金属催化剂的组合,用于醛和酮的烯丙基化反应。
Copper-Catalyzed Diamination of Alkenes of Unsaturated Ketohydrazones with Amines
作者:Manman Chen、Li-Jing Wang、Pei-Xing Ren、Xiao-Ying Hou、Zhang Fang、Meng-Nan Han、Wei Li
DOI:10.1021/acs.orglett.7b03401
日期:2018.2.2
A convenient copper-catalyzed intra-/intermoleculardiamination of β,γ-unsaturated hydrazones has been developed with simple amines as external amine sources. The protocol enables efficient access to various nitrogen-containing pyrazolines under mild reaction conditions.
Indium mediated allylation and propargylation reactions of dimethyl acetals and ketals
作者:Jin Sun Kwon、Ae Nim Pae、Kyung Il Choi、Hun Yeong Koh、Youseung Kim、Yong Seo Cho
DOI:10.1016/s0040-4039(01)00042-9
日期:2001.3
Indium mediated allylation and propargylation reactions of acetals and ketals with various allyl or propargyl bromides in aqueousmedia successfully provided the corresponding homoallylic or homopropargylic (and allenylic) alcohol, respectively, in moderate to good yields. Highly chemoselectiveallylation is also described. The ketal and aryl acetal could be selectively allylated over the aliphatic
Isoprene reacts with aldehydes in the presence of a catalytic amount of Pd(OAc)2–4PPh3 or Pd(PPh3)4 and a stoichiometric amount of SnCl2 at 40–50 °C in AcOH–H2O to produce 1-substituted 2,2-dimethyl-3-buten-1-ols regioselectively.