Convenient Preparation of Cyclic Acetals, Using Diols, TMS-Source, and a Catalytic Amount of TMSOTf
作者:Masaaki Kurihara、Wataru Hakamata
DOI:10.1021/jo020471z
日期:2003.5.1
amount of trimethylsilyl trifluoromethanesulfonate (TMSOTf), carbonylcompounds are converted to acetals in good yields under mild conditions. This procedure, which was carried out without synthesizing the silylated diols, is a more convenient adaptation of Noyori's method. This acetalization applies to not only simple but also conjugated carbonylcompounds. Moreover, various TMS compounds, including
Facile Procedure for Acetalization Using Diols, Alkoxysilane and a Catalytic Amount of Trimethylsilyl Trifluoromethanesulfonate
作者:Masaaki Kurihara、Naoki Miyata
DOI:10.1246/cl.1995.263
日期:1995.4
In the presence of sec- or tert-alkoxysilane and a catalytic amount of trimethylsilyl trifluoromethanesulfonate (TMSOTf), carbonyl compounds react with various diols to give acetals in high yields.
Highly efficient and chemoselective interchange of 1,3-oxathioacetals and dithioacetals to acetals promoted by N-halosuccinimide
作者:Babak Karimi、Hassan Seradj、Jafar Maleki
DOI:10.1016/s0040-4020(02)00389-7
日期:2002.5
Highly efficient interconversion of a range of 1,3-oxathiolanes, 1,3-dithiolanes and 1,3-dithianes to their acetals at ambient temperature using N-bromosuccinimide or N-chlorosuccinimide and different types of alcohols and diols was investigated.
<i>N</i>-Bromosuccinimide (NBS) Catalyzed Highly Chemoselective Acetalization of Carbonyl Compounds Using Silylated Diols and Pentaerythritol under Neutral Aprotic Conditions
作者:Babak Karimi、Hassan Hazarkhani、Jafar Maleki
DOI:10.1055/s-2004-837291
日期:——
Various types of carbonylcompounds are efficiently convened to their 1,3-dioxanes and pentaerythritol diacetals by the use of either 1,3-bistrimethylsiloxy propane (A) or 1,3-bistrimethylsilanyloxy-2,2-bistrimethylsilanyloxymethyl propane (D) and a catalytic amount of N-bromosuccinimide (3-10 mol%) under essentially neutral aprotic condition, respectively. A variety of functionalities such as both
Iodine-Catalyzed, Efficient and Mild Procedure for Highly Chemoselective Acetalization of Carbonyl Compounds under Neutral Aprotic Conditions
作者:Babak Karimi、Behzad Golshani
DOI:10.1055/s-2002-25775
日期:——
Various types of carbonyl compounds are efficiently converted to their 1,3-dioxanes by the use of 1,3-bis(trimethylsiloxy)propane (BTSP) and a catalytic amount of iodine (3-7 mol%) under essentially neutral aprotic condition.