Preparation and Reactivity of Polyfunctional Zinc and Copper Organometallics Bearing Sulfur Functionalities
作者:S. Achyutha Rao、Tso-Sheng Chou、Ioana Schipor、Paul Knochel
DOI:10.1016/s0040-4020(01)88872-4
日期:1992.1
phenyl sulfides 6 were found to insert zinc dust in THF under very mild conditions (10–25 °C, 0.5–2 h) leading to zinc α-thioorganometallics. After a transmetallation with CuCN·2 LiCl, the corresponding copper reagents 8 and 7 reacted with various electrophiles (1-haloalkynes, aldehydes, enones, acyl chlorides, allylic halides, trialkyltin halides) affording polyfunctional thioesters and sulfides of type
Iodomethylthiobenzoate 5和α-氯代苯基硫化物6被发现非常温和的条件(10-25℃,0.5-2 1H)导致锌α-thioorganometallics下插入在THF锌粉。用CuCN·2 LiCl进行金属转移后,相应的铜试剂8和7与各种亲电试剂(1-卤代炔烃,醛,烯酮,酰氯,烯丙基卤化物,三烷基卤化锡)反应,得到9或10型多官能硫酯和硫化物。高产。特别令人感兴趣的是,与α-硫代碳酸锂相反,这些锌铜试剂可以带有各种官能团,例如酯或腈。相同的方法使各种γ硫代取代的锌和铜的试剂轴承苯硫基,苯基亚磺酰基,或α-(苯基磺酰基)乙烯基官能度(制备20-22),这也显示了良好的能力以形成新carboncarbon键。