Aniline mediated oxidative C–C bond cleavage of α-alkoxy aldehydes in air and a model reaction for the synthesis of α-(d)-amino acid derivatives
作者:Bin Hu、Yunfeng Li、Zhongjun Li、Xiangbao Meng
DOI:10.1039/c3ob40685g
日期:——
4-methyl aniline mediated method for the oxidativeC–C bond cleavage has been developed. The reaction proceeds in airusing molecular oxygen as the oxidant, affording one-carbon shortened esters in moderate to good yields within a short time. Moreover, it provides a model reaction for the highly enantioselective synthesis of (D)-serine esters by combining with a L-proline catalyzed Mannich reaction.
A Brønsted Acid Catalyzed Cascade Reaction for the Conversion of Indoles to α‐(3‐Indolyl) Ketones by Using 2‐Benzyloxy Aldehydes
作者:Ankush Banerjee、Modhu Sudan Maji
DOI:10.1002/chem.201902268
日期:2019.9.2
A Brønstedacid catalyzed, operationally simple, scalable route to several functionalized α-(3-indolyl) ketones has been developed and the long-standing regioisomeric issue has been eliminated by choosing appropriate carbonyls. A readily available and cheap bottle reagent was used as the catalyst. This protocol was also applicable to the synthesis of densely functionalized α-(3-pyrrolyl) ketones. A
Synergistic Peptide and Gold Catalysis: Enantioselective Addition of Branched Aldehydes to Allenamides
作者:Leo D. M. Nicholls、Helma Wennemers
DOI:10.1002/chem.202103197
日期:2021.12.15
A synergistic combination of a tripeptide and a gold complex catalyzes the enantioselectiveaddition between branchedaldehydes and allenamides to furnish synthetically versatile γ,δ-enamide aldehydes with a fully substituted stereogenic center. Mechanistic studies offered key insights into the role of the peptide and acid/base additives.
α-Aroyloxyaldehydes: scope and limitations as alternatives to α-haloaldehydes for NHC-catalysed redox transformations
作者:Kenneth B. Ling、Andrew D. Smith
DOI:10.1039/c0cc02456b
日期:——
α-Aroyloxyaldehydes are readily prepared bench stable synthetic intermediates. Their ability to act as α-haloaldehyde surrogates for NHC-promoted redox esterifications and in [4+2] cycloadditions is described.
Facile synthesis of α-alkoxyl amides <i>via</i> scandium-catalyzed oxidative reaction between ynamides and alcohols
作者:Zhi-Xin Zhang、Bo-Han Zhu、Pei-Xi Xie、Jia-Qi Tang、Xin-Ling Li、Chunyin Zhu、Ying-Wu Yin、Long-Wu Ye
DOI:10.1039/c8ra03842b
日期:——
A novel and efficient scandium-catalyzed oxidativereaction between ynamides and alcohols for the facilesynthesis of various α-alkoxyl amides is reported in this paper. The reaction avoids the need for the use of α-diazo carbonyls which are unstable and may cause some safety concerns. Instead, by using alkynes as the starting materials, this protocol features readily available substrates, compatibility