Conversion of Aldehydes into Geminal Dicarboxylates (Acylals) Catalyzed by Lithium Tetrafluoroborate
作者:Norihiko Sumida、Kuniaki Nishioka、Tsuneo Sato
DOI:10.1055/s-2001-18774
日期:——
A variety of aldehydes react with acid anhydrides in the presence of a catalytic amount of lithium tetrafluoroborate to afford the corresponding geminal dicarboxylates (acylals) in good to excellent yields.
Chandra, Kusum Lata; Saravanan; Singh, Vinod K., Synlett, 2000, # 3, p. 359 - 360
作者:Chandra, Kusum Lata、Saravanan、Singh, Vinod K.
DOI:——
日期:——
Simple, One‐Pot Procedure for the Generation of Homoallylic Alcohols from Barbier‐Type Allylation of Gem‐diacetates in the Presence of β‐Cyclodextrin in Water
作者:M. Somi Reddy、M. Narender、Y. V. D. Nageswar、K. Rama Rao
DOI:10.1080/00397910701356371
日期:2007.6
Lithium Trifluoromethanesulfonate (LiOTf) as a Recyclable Catalyst for Highly Efficient Acetylation of Alcohols and Diacetylation of Aldehydes under Mild and Neutral Reaction Conditions
作者:Babak Karimi、Jafar Maleki
DOI:10.1021/jo026678+
日期:2003.6.1
A variety of alcohols and aldehydes were reacted with acetic anhydride at room temperature in the presence of a catalytic amount of lithium triflate (LiOTf) to produce the corresponding esters and 1,1-diacetates, respectively, in good to excellent yields under essentially neutral reaction conditions. Sensitive functional groups such as PhCO2-, OMe, and OTBDMS ethers survived intact under the described reaction conditions.
Reductive esterification of aromatic aldehydes using Zn/Ac2O/imidazole or Zn/Yb(OTf)3/(RCO)2O system
Benzaldehydes are reduced by metallic zinc in the presence of Ac2O and imidazole, giving the corresponding benzyl acetates in good yields. Reductive esterification of aromatic aldehydes is also carried out via gem-diacetoxy compounds. Carbonylcompounds are readily converted to the gem-diacyloxy compounds in excellent yields on treatment with 2 molar amounts of acid anhydride and 10 mol% of Yb(OTf)3