ChemInform Abstract: REACTIONS OF METHYL㏒UBSTITUTED CYCLOPENTANONES WITH LITHIUM ALUMINUM HYDRIDE AND METHYLLITHIUM. STRUCTURAL DETERMINATIONS AND PROTON NUCLEAR MAGNETIC RESONANCE STUDY OF THE REACTION PRODUCTScyclopentane derivativesVerschiedene methylierte Cyclopentanone (II) reagieren mit Lithiumalanat vor...
Treatment of 1-chlorovinyl p-tolyl sulfoxides derived from ketones with cyanomethyllithium gave cyclopentadienyl enaminonitriles in high yields with three consecutive carbon–carbon bond-formations. However, the 1-chlorovinyl p-tolyl sulfoxides derived from aldehydes did not give good results. The ...
2-Methylamino-1-cyclopentene-1-dithiocarboxylic acid (II) can be obtained in low yield from cyclopentanone with carbon disulfide and methylamine; no other 2-alkylamino analogs can be synthesized. The amino group of 2-amino-1-cyclopentene... B Bordas,P Sohar,G Matolcsy,... - 《Journal of ...
LVII. Reactions of 2-Propynyl Sulfones with Cyclic Ketones 2-Butynyl phenyl sulfone (VI) and cyclic ketones were treated with sodium hydride to give the corresponding 1: 1 addition products, respectively. The structures were assigned to 1-phenylsulfonyl-3-(1-cyclohexenyl) 2-butanone (VII) and...
Preparation of Cyclopentanone: This chemical can be prepared by adipate in the presence of baryta with heating. Uses of Cyclopentanone: It can react with pyrrolidine to produce 1-cyclopent-1-enyl-pyrrolidine. This reaction will need reagent methyl iodide and bis(trimethylsilyl)acetamide, and the me...
For example, various processes can be mentioned, such as a process in which hydrogen at the 2-position of furan is drawn out with a strong base such as an alkyllithium and an anion formed is added to an aldehyde represented by the following formula (40): R12—CHO (40) (where...
1-chlorovinyl p-tolyl sulfoxidesAcetonitrileEnaminonitrilesMagnesium alkylidene carbenoids1-halovinyl sulfoxidesCyclization reactionsOrganic-synthesisGenerationPropertyTreatment of 1-chlorovinyl p-tolyl sulfoxides derived from ketones with cyanomethyllithium gave cyclopentadienyl enamino-nitriles in high yields ...
The addition of excess HMPA and an equivalent of chlorotrialkylstannane or dimethylzinc (1) realizes complete monoalkylation of lithium enolate with methyl iodide in THF. These conditions were successfully applied to the three-component prostaglandin synthesis.Mixing lithium enolate and chlorotrimethyl...
The corresponding mixture of acids on treatment with methyl lithium and subsequent acetylation furnished the keto acetates 43 and 44, resulting in a formal synthesis of planococcyl acetate (4).doi:10.1016/S0040-4020(01)88398-8Arun Ghosh
The furan derivative of formula II used as the raw material can be obtained easily, e.g. by reacting the lithium compound of the corresponding furan with the corresponding benzyl halide derivative.KAMETANI TETSUJI