Direct Synthesis of γ‐Keto Sulfones from Allylic Alcohols: One‐Pot Palladium(II)‐Catalyzed Generation of Enones Followed by Water‐Mediated 1,4‐Addition of Organosulfinates
作者:Mari Vellakkaran、Murugaiah M. S. Andappan、Kommu Nagaiah、Jagadeesh Babu Nanubolu
DOI:10.1002/ejoc.201600494
日期:2016.7
which indicated a chemoselective catalytic system for the preparation of halogen-bearing γ-keto sulfones. This one-pot method does not require an acid, a base, or isolation of any intermediate. Control experiments indicated that the active catalyst of the first step also promoted the subsequent C–S bond-formation reaction. Water was found to accelerate the reaction rate and to be involved in the protonolysis
Silver(I)-Promoted Radical Sulfonylation of Allyl/Propargyl Alcohols: Efficient Synthesis of γ-Keto Sulfones
作者:Guichun Fang、Jianquan Liu、Weidong Shang、Qun Liu、Xihe Bi
DOI:10.1002/asia.201601223
日期:2016.12.6
sulfonylation of allyl/propargyl alcohols with sodium sulfinates has been developed. The reaction tolerates a wide range of functional groups to deliver γ‐keto sulfones in high yields (up to 93 %). Propargyl alcohols furnished trimerization product 1,3,5‐triaroylbenzenes in the presence of sodium methanesulfinate under the standard conditions. A mechanism involving a sulfonyl radical was suggested.
已经开发出了一种有效的由亚磺酸钠与丙烯/炔丙基醇进行的Ag 2 CO 3促进的磺酰化反应。该反应可耐受多种官能团,以高产率(高达93%)提供γ-酮砜。在标准条件下,在甲磺酸钠存在下,炔丙醇提供了三聚产物1,3,5-三芳酰苯。提出了涉及磺酰基的机理。