Diethoxytriphenylphosphorane: a mild, regioselective cyclodehydrating reagent for conversion of diols to cyclic ethers: stereochemistry, synthetic utility, and scope
Diastereoselective epoxidation of olefins by organo sulfonic peracids, II
作者:R. Kluge、M. Schulz、S. Liebsch
DOI:10.1016/0040-4020(95)01128-5
日期:1996.2
have investigated the behaviour of sulfonic peracids 2in situ generated towards olefins 7a,7b,9,11,14,16,18, allylic and homoallylic alcohols 20,22,24,26,28,30,33 and α,β-unsaturated ketones 35,37,39. Generally, the epoxidation proceeds in a peracid-like manner with greater diastereoselectivity than those by common oxidants. In particular, the epoxidation of Δ4 3-ketosteroids 39a-i led to 4α,5α-epoxides
The Formation of Sobrelol Ethers by the Alcoholysis of Pinene Epoxides
作者:Sevinç Ilkar Erdagi、Funda Gul Boztas、Cavit Uyanik
DOI:10.3184/174751916x14615863512197
日期:2016.5
The alcoholysis of the epoxides of α- and β-pinene catalysed by tetracyanoethylene form the 8-alkyl ethers of trans-sobrerol and 7,8-dihydroxy-p-menth-1-ene, respectively.
Reactions of Epoxides Prepared from Some Monoterpenes with Acetic Anhydride on Aluminosilicate Catalysts
作者:L. E. Tatarova、D. V. Korchagina、K. P. Volcho、N. F. Salakhutdinov、V. A. Barkhash
DOI:10.1023/b:rujo.0000010173.38389.06
日期:2003.8
Reactions of epoxides prepared from alpha-, beta-pinenes and camphene with acetic anhydride on aluminosilicate catalysts (clay K-10, zeolite beta) were investigated affording various products of skeleton I C rearrangements: mono- and diacetates with five- and six-membered rings, and also with norbornane and pinane cores.
Synthesis of monohydroxy -methyl- and -ethyl-phosphines PPh2CHROH
作者:Guillermo Muller、Daniel Sainz
DOI:10.1016/0022-328x(95)05425-o
日期:1995.6
The preparation of alpha-hydroxyphosphines PPh(2)CHROH with R = H (a), Ph (b) and Et (c), and beta-hydroxyphosphines PPh(2)CHR'HROH (e-i) has been achieved in high yield by reaction of HPPh(2) or LiPPh(2) with RCHO or the oxides of cyclohexene (e), limonene (f), styrene (g, h) and pinene (i). With the exception of styrene oxide, the reactions with the oxides are very regioselective, giving only one of the possible isomers. Cis- and trans-limonene oxides react with LiPPh(2) in different conditions selectively, giving trans-phosphino derivatives from commercial mixtures of limonene oxide.