A general palladium-catalyzedsynthesis of linear esters directly from sec- and tert-alcohols is described. Compared to the classic Koch–Haaf reaction, which leads to branched products, this new transformation gives the corresponding linear esters in high yields and selectivity. Key for this protocol is the use of an advanced palladium catalyst system with L2 (pytbpx) as the ligand. A variety of aliphatic
直接从直链酯的一般钯催化合成的仲-和叔-醇进行说明。与导致分支产物的经典科赫-哈夫反应相比,这种新的转化以高收率和选择性提供了相应的线性酯。该协议的关键是使用具有L2(py t bpx)作为配体的高级钯催化剂体系。可以直接使用多种脂族和苄醇,基准反应的催化剂效率非常出色(周转数高达89 000)。
Efficient Palladium‐Catalyzed Carbonylation of 1,3‐Dienes: Selective Synthesis of Adipates and Other Aliphatic Diesters
The dicarbonylation of 1,3‐butadiene to adipic acid derivatives offers the potential for a more cost‐efficient and environmentally benign industrial process. However, the complex reaction network of regioisomeric carbonylation and isomerization pathways, make a selective and direct transformation particularly difficult. Here, we report surprising solvent effects on this palladium‐catalysed process
将1,3-丁二烯二羰基化为己二酸衍生物可为更具成本效益和环境友好的工业生产提供潜力。然而,区域异构体羰基化和异构化途径的复杂反应网络使得选择性和直接转化特别困难。在这里,我们报道了在存在1,2-双-二叔丁基膦膦-二甲苯(d t bpx)配体的情况下,钯催化的这一过程产生了令人惊讶的溶剂影响,这些配体允许由1,3-丁二烯,碳形成己二酸酯二酯。一氧化碳和甲醇,在可扩展条件下具有97%的选择性和100%的原子经济性。在最佳条件下,可以以高至极好的收率获得各种1,2-和1,3-二烯的二酯和三酯。
Abderrahman, Ben Moufida; Laurent, Eliane; Marquet, Bernard, Bulletin de la Societe Chimique de France, 1988, # 3, p. 571 - 578
作者:Abderrahman, Ben Moufida、Laurent, Eliane、Marquet, Bernard
DOI:——
日期:——
Staellberg; Stenhagen, Arkiv foer Kemi, 1950, vol. 2, p. 95,102
作者:Staellberg、Stenhagen
DOI:——
日期:——
Linstead et al., Journal of the Chemical Society, 1950, p. 3331