Aromatische Spirane, 20. Mitt.: Darstellung von dimethylsubstituierten 2-Carboxymethyl-indan-1-onen und Benzylchloriden als Synthone f�r Synthesen von di- bis tetramethylierten 2,2?-Spirobiindandionen
摘要:
The isomeric dimethyl methylbenzoates 5, obtained from the bromides via Grignard reactions with dimethylcarbonate, were reduced with LiAlH4 to the hydroxymethyl derivatives 6. The latter were then transformed both to the benzylchlorides 7 (with SOCl2) and to the aldehydes 8 (with pyridinium chlorochromate). Knoevenagel-Doebner reaction of 8 afforded the acrylic acids 9 which (after hydrogenation to 11) were cyclized to the desired indanones 12 with polyphosphoric acid. On the other hand, 12c and 12e were prepared from dimethyl 3-chloropropiophenone (14) by warming with sulfuric acid. After NaH-catalyzed reaction with dimethylcarbonate, the indanones 12 gave the ketoesters 15 which then could be hydrogenated to the indanes 16. All reactions proceeded with satisfactory to excellent yields (60-90%).
Abstract The catalytic oxidation of benzyl halides to aldehydes and ketones in aqueous media was studied under relatively mild reaction conditions by using phase-transfer catalyst combined with potassium nitrate and 10% aqueous potassiumhydroxidesolution. As a result, a simple high-yield procedure has been developed.
Simple, High Yield Preparation of<i>N</i>-Benzylacetamides by Lewis Acid-Catalyseed Reaction of Benzyl Chlorides or Benzyl Methyl Ethers with Acetonitrile
作者:Mesut Kacan、Alexander McKillop
DOI:10.1080/00397919308018613
日期:1993.8
Abstract Reaction of either benzyl chlorides or benzyl methyl ethers with hydrated ferric chloride in acetonitrile results in smooth Ritter reaction and formation of N-benzylacetamides in excellent yield.
Synthesis and antirhinovirus activity of 6-(dimethylamino)-2-(trifluoromethyl)-9-(substituted benzyl)-9H-purines
作者:James L. Kelley、James A. Linn、J. W. T. Selway
DOI:10.1021/jm00128a016
日期:1989.8
A series of 6-(dimethylamino)-2-(trifluoromethyl)-9-(substituted benzyl)purines was synthesized and tested for antirhinovirusactivity. Most of the compounds were synthesized by alkylation of 6-chloro-2-(trifluoromethyl)-9H-purine with the appropriate benzyl halide followed by displacement of the chloro group with dimethylamine. Alternatively, 6-(dimethylamino)-2-(trifluoromethyl)purine was alkylated
N6-(indol-3-yl)alkyl derivatives of adenosine were synthesized. The adenosinereceptor affinity and the antinociceptive activity of these compounds were assessed in binding studies and the phenylbenzoquinone-induced writhing test. Most of these analogues exhibited a potent analgesic activity without side effects. Among them, compound 3c (UP 202-32) bound to A1 (Ki = 110 nM) and A2 (Ki = 350 nM) adenosine receptors
Compounds of formula (I)
1
or pharmaceutically acceptable salts thereof, inhibit farnesyltransferase. Methods for making the compounds, pharmaceutical compositions containing the compounds, and methods of treatment using the compounds are disclosed.