1,2,3-Triazole: Unique Ligand in Promoting Iron-Catalyzed Propargyl Alcohol Dehydration
摘要:
A 1,2,3-traizole-promoted Iron(III)-catalyzed propargyl alcohol dehydration was developed for the synthesis of conjugated enynes. The desired conjugated enynes were prepared in good to excellent yields (up to 95%) with a large substrate scope and excellent stereoselectivity (only Z-isomers).
2(3 H )-呋喃酮非常重要,不仅因为它们在生物活性化合物中广泛存在,而且因为它们在有机合成中的多功能性。在这里,已经建立了一种在 CO 存在下使用铑作为催化剂从容易获得的叔炔醇与芳基硼酸制备 2(3 H )-呋喃酮的直接方法。该方法表现出广泛的底物范围,可耐受有用的官能团,并具有中等到高的立体选择性。
A Brønsted acid catalyzed C3-selective tert-alkylation of indoles using tertiary propargylic and benzylic alcohols has been developed. New C3-propargylated indole derivatives with a quaternary carbon at the propargylic position have been efficiently synthesized. Reactions were performed in air with undried solvents, and water was the only side product of the process.
Brønsted acid−catalyzed synthesis of tetrasubstituted allenes and polysubstituted 2H-chromenes from tertiary propargylic alcohols
作者:Natalia Cabrera-Lobera、Noelia Velasco、Roberto Sanz、Manuel A. Fernández-Rodríguez
DOI:10.1016/j.tet.2019.05.023
日期:2019.8
A practical and environmentally benign Brønstedacid−catalyzed protocol for the preparation of all-carbon tetrasubstituted allenes, consisting in the direct SNˈ addition of tri- or dimethoxy arenes or allyltrimethylsilane to tertiary propargylic alcohols, has been developed. In addition, a straightforward synthesis of densely substituted 2H-chromenes by metal-free tandem allenylation/heterocyclization
Brønsted Acid Catalyzed Alkylation of Indoles with Tertiary Propargylic Alcohols: Scope and Limitations
作者:Roberto Sanz、Delia Miguel、Alberto Martínez、Mukut Gohain、Patricia García-García、Manuel A. Fernández-Rodríguez、Estela Álvarez、Félix Rodríguez
DOI:10.1002/ejoc.201001055
日期:2010.12
Junta de Castilla y Leon (BU021A09 and GR-172) and the Ministerio de Educacion y Ciencia (MEC) and FEDER (CTQ2007-61436/BQU and CTQ2009-09949/BQU) for financial support. D. M. and A. M. thank the MEC for MEC-FPU predoctoral fellowships. M. G. thanks the MEC for a "Young Foreign Researchers" contract (SB2006-0215). M. A. F.-R. and P. G.-G. also thank the MEC for "Ramon y Cajal" and "Juan de la Cierva"
Junta de Castilla y Leon (BU021A09 和 GR-172) 以及教育部长 (MEC) 和 FEDER (CTQ2007-61436/BQU 和 CTQ2009-09949/BQU) 提供财政支持。DM 和 AM 感谢 MEC 提供 MEC-FPU 博士前奖学金。MG 感谢 MEC 的“外国青年研究人员”合同 (SB2006-0215)。MAF-R。和PG-G。还要感谢 MEC 的“Ramon y Cajal”和“Juan de la Cierva”合同。
1,2,3-Triazole: Unique Ligand in Promoting Iron-Catalyzed Propargyl Alcohol Dehydration
作者:Wuming Yan、Xiaohan Ye、Novruz G. Akhmedov、Jeffrey L. Petersen、Xiaodong Shi
DOI:10.1021/ol300778e
日期:2012.5.4
A 1,2,3-traizole-promoted Iron(III)-catalyzed propargyl alcohol dehydration was developed for the synthesis of conjugated enynes. The desired conjugated enynes were prepared in good to excellent yields (up to 95%) with a large substrate scope and excellent stereoselectivity (only Z-isomers).
10.1021/acs.orglett.4c02364
作者:He, Wenxiang、Zheng, Wei-Feng、Qian, Hui
DOI:10.1021/acs.orglett.4c02364
日期:——
2(3H)-Furanones are tremendously important not only because of their wide occurrence in bioactive compounds but also due to their versatility in organic synthesis. Here, a straightforward approach to 2(3H)-furanones from readily available tertiary propargylic alcohols with arylboronic acids in the presence of CO using rhodium as a catalyst has been established. The method exhibits a broad substrate
2(3 H )-呋喃酮非常重要,不仅因为它们在生物活性化合物中广泛存在,而且因为它们在有机合成中的多功能性。在这里,已经建立了一种在 CO 存在下使用铑作为催化剂从容易获得的叔炔醇与芳基硼酸制备 2(3 H )-呋喃酮的直接方法。该方法表现出广泛的底物范围,可耐受有用的官能团,并具有中等到高的立体选择性。