Reaction of Enol Ethers with the I2-H2O2 System: Synthesis of 2-Iodo-1-methoxy Hydroperoxides and Their Deperoxidation and Demethoxylation to 2-Iodo Ketones
PREPARATION AND REACTIONS OF 2-SUBSTITUTED 3-TRIMETHYLSILYL-4-EN-1-ONE SYSTEM
作者:Isao Kuwajima、Toshihiko Tanaka、Kunio Atsumi
DOI:10.1246/cl.1979.779
日期:1979.7.5
Various 3-trimethylsilyl-4-en-1-one types of compounds have been prepared by using 3-trimethylsilylallyl alcohol. Some of them can be efficiently converted into the corresponding cyclization products, 3-cyclopenten-1-ols, or dienone types of compounds.
A new efficient procedure was developed for the synthesis of geminal bisperoxides by reaction of ketals and enol ethers with tert-butylhydroperoxide catalyzed by protic or Lewis acids.
Expansion of the ring of cyclododecanone by two and four carbon atoms
作者:R. C. Cookson、Prithipal Singh
DOI:10.1039/j39710001477
日期:——
Condensation of 1-methoxycyclododec-1-ene (II) with 2-methylbut-3-yn-2-ol forms, through Cope rearrangement of the intermediate enol ether, the α-3,3-dimethylallenyl-cyclododecanone (III). On u.v. irradiation (II) isomerises with 1,3-acyl migration to 2-isopropylidenecyclotetradec-3-trans-enone (V). The alcohol (VII) from addition of vinylmagnesium bromide to the allenic ketone (III) undergoes thermal
A compound of the formula (I): ##STR1## salt thereof, or hydrate thereof which can effectively be absorbed from the lymph vessel in the intestinal tract and transferred to the lymph node in a high concentration is provided.
METHOD FOR PRODUCING ALPHA-ALLYLATED CYCLOALKANONE
申请人:Kao Corporation
公开号:US20220153672A1
公开(公告)日:2022-05-19
Provided is a method with which an α-allylated cycloalkanone is obtained from a macroyclic compound used as a starting material. The method is a method for producing an α-allylated cycloalkanone represented by General Formula (IV), and the method includes a step of reacting a compound represented by General Formula (I) and/or a compound represented by General Formula (II) with a compound represented by General Formula (III) in the presence of an acid catalyst to produce an α-allylated cycloalkanone represented by General Formula (IV), the acid catalyst including an acid catalyst that includes an ammonium cation and an anion.
where R
1
, R
2
, and R
3
are the same or different and each of them is an alky group having 1 or mom and 4 or less of carbon atoms, the group -A
1
- (it should be noted that the front bond refers to a bond that binds to the carbon atom C
1
and the back bond refers to a bond that binds to the carbon atom C
2
) is an alkylene group having 4 or more and 20 or les of carbon atoms that optionally contains a hetero atom and optionally has a substituent, and R
4
is a hydrogen atom or an alkyl group having 1 or more and 4 or less of carbon atoms.