A Versatile Synthesis of Four-, Five-, and Six-membered Cyclic Ketones Using Methyl Methylthiomethyl Sulfoxide
作者:Katsuyuki Ogura、Mitsuo Yamashita、Michiyo Suzuki、Shigeko Furukawa、Gen-ichi Tsuchihashi
DOI:10.1246/bcsj.57.1637
日期:1984.6
in the presence of a base (n-BuLi or KH) gave three-, four-, five-, and six-membered 1-methylsulfinyl-1-methylthiocycloalkanes. These cyclization products were easily converted to the corresponding ketones by acid hydrolysis except 1-methylsulfinyl-1-methylthiocyclopropane which afforded a complicated mixture. The combination of the cyclization with the acid hydrolysis thus provides a new method for
在碱(n-BuLi 或 KH)存在下,1,n-二卤代[或双(甲苯磺酰氧基)]烷烃与甲基甲硫基甲基亚砜的环化得到三、四、五和六元 1-甲基亚磺酰基- 1-甲硫基环烷烃。这些环化产物很容易通过酸水解转化为相应的酮,除了 1-甲基亚磺酰基-1-甲硫基环丙烷提供复杂的混合物。因此,环化与酸水解的结合提供了合成四元、五元和六元环烷酮的新方法。描述了几种代表性的制备,例如取代的环丁酮、3-环戊烯酮和四氢-4-吡喃酮的制备。