作者:Hiroshi Minato、Kentaro Okuma、Michio Kobayashi
DOI:10.1246/bcsj.49.3601
日期:1976.12
Ethoxydimorpholinosulfonium tetrafluoroborate and tetraphenylborate were prepared by ethylation of dimorpholino sulfoxide. They were readily hydrolyzed with water but did not react with methanol. In the reactions with nucleophiles, they acted as ethylating agent for β-picoline, triethylamine, diethylamine, methoxide ion, and chloride ion. When dimorpholino sulfide, 1-chlorobenzotriazole, and an alcohol were
通过二吗啉亚砜的乙基化制备乙氧基二吗啉锍四氟硼酸盐和四苯基硼酸盐。它们很容易用水水解,但不与甲醇反应。在与亲核试剂的反应中,它们作为β-甲基吡啶、三乙胺、二乙胺、甲醇离子和氯离子的乙基化剂。当二吗啉代硫化物、1-氯苯并三唑和醇在-80 °C 反应时,主要产物是烷基氯、二吗啉代亚砜和吗啉氯化物。烷氧基二吗啉代锍氯化物被认为是中间体,它通过氯离子对烷基的 SN2 型亲核攻击而分解。当使用 (+)-2- 辛醇时,形成的 2-氯辛烷几乎完全反转构型(对映体过量,97%)。