Reactions of Alkyl Diphenylphosphinates and Related Thio Esters with Some Nucleophiles.<i>S</i><sub>N</sub>2 (S) Reaction and Wittig Type Rearrangement
作者:Koshiro Goda、Renji Okazaki、Kin-ya Akiba、Naoki Inamoto
DOI:10.1246/bcsj.51.260
日期:1978.1
irrespective of X, while, when X=Y=S, the reaction occurred exclusively at the ester sulfur atom, SN2(S), to give R3SCHR1R2 and [Ph2PS]−. When the X=O and Y=S, a Wittig type rearrangement of a carbanion [Ph2P(=O)SCR1R2]− was observed along with attacks on the phosphorus (major) and the sulfur (minor) atoms. Reactions with some other nucleophiles (hydride, amide and alkoxide ions) are also described.
烷基二苯基次膦酸盐 Ph2P(=X)YCHR1R2 (X, Y=O,S) 与有机锂和格氏试剂反应,根据 X 和 Y 的结合得到不同类型的产物。当 Y=O 时,试剂 (R3M) 主要攻击磷原子得到 Ph2P(=X)R3 和 R1R2XCHO−,而与 X 无关,而当 X=Y=S 时,反应仅发生在酯硫原子 SN2(S) 上,得到 R3SCHR1R2 和 [Ph2PS]− . 当 X=O 和 Y=S 时,观察到碳负离子 [Ph2P(=O)SCR1R2]- 的 Wittig 型重排以及对磷(主要)和硫(次要)原子的攻击。还描述了与一些其他亲核试剂(氢化物、酰胺和醇盐离子)的反应。