Butyl-dimethyl 2- -methyl

V-methyl- /V-trimethyl-silyltrifluoroacetami de /-butyl dimethyl silylimid- a2ole [24589-78-4] MSTFA (CH3)3SiN(CH3)COCF3... 

Thiazoline-2-thione, 3-amino-pharmacological properties, 6, 328 4-Thiazoline-2-thione, 5-amino-Cook s rearrangement, 6, 290 4-Thiazoline-2-thione, 4-/-butyl-3-methyl-rearrangement, 6, 291 4-Thiazoline-2-thione, 3,4-dialkyl-conformation, 6, 247 4-Thiazoline-2-thione, 4,5-dimethyl-reactions... 

Michael addition of the enolate of (42 )-4-rm-butyl-3-methyl-2-oxetanone to dimethyl (Z)-butenedioate yields a single diastereomer. This provides a method to control two new vicinal stereogenic centers one quaternary and one tertiary. The topicity of the addition is u with respect to the 3,3 -bond and l with respect to the 3, 4 -bondI09. 

CiiHnNO 84080-68-2) see Cefixime 17,21-(l-butyl-l-methoxymcthylenedioxy)-3,20-dioxo-9-fluoro-lip-hydroxy-l(Sa-methyl-l,4-pregnadiene (C2gH3gF06 1062-64-2) see Dexamethasone valerate S-(crt-butyl 3-methyl 2,6-dimethyl-4-(3-nitrophenyl)-l,4-dihydropyridine-3,5-[Pg.2319]

DMII = N,N-dimethyl imidazohum iodide DEII = N,N-diethyl imidazohum iodide BMII = N-butyl-N-methyl imidazohum iodide [Etpy]I = N-ethyl pyridinium iodide [pyMe]I = N-methyl pyridinium iodide MTOPI = methyl trioctyl phosphonium iodide [BusPMe] = methyl tributyl phosphonium iodide. 

Benzene, 2-methyl-4- (2-methylpropyl)-1,3,5-trinitro Benzene, 5-(l,l-dimethylethyl)-2-ethyl-l, 3-dinitro-Ethanone, l-(2-butyl-3-methyl-4, 6-dinitrophenyl)-Benzene, l-(l,l-dimethylethyl)-2-methoxy-3, 5-dimethyl-4, 6-dinitro... 

Benzyloxy-4-isopropyl(or 4-terf-butyl)-4-methyl-5(4//)-oxazolones 780 have been prepared from an A-benzyloxycarbonylamino acid 779 using l-(3-dimethyl-aminopropyl)-3-ethylcarbodiimide hydrochloride (EDAC HCl) as the cyclization agent (Scheme 7.237). Treatment of 780 with tetramethylfiuoroformamidinium hexafiuorophosphate (TFFH) has shown that they are possible intermediates in the fluorination of a-methyl-a-alkyl amino acids by TFFH. 

Hydroxy-N,N-tetramethylene-T A complexly substituted-T N,N-Diethyl-L N-Butyl-N-methyl-T N,N-Diisopropyl-4,5-methylenedioxy-T N,N-Diisopropyl-5,6-methylenedioxy-T N,N-Dimethyl-4,5-methylenedioxy-T N,N-Dimethyl-5,6-methylenedioxy-T N-Isopropyl-N-methyl-5,6-methylenedioxy-T N,N-Diethyl-2-methyl-T 2,N,N-Trimethyl-T N-Acetyl-5-methoxy-T N,N-Diethyl-5-methoxy-T N,N-Diisopropyl- 5-methoxy-T... 

The method has been applied by the submitters2 to the preparation of cyclohexylmethylpropiolaldehyde diethyl acetal (54% yield) from cyclohexylmethylacetylene and triethyl orthoformate of phenylethynyl n-butyl dimethyl ketal (40% yield) from phenylacetylene and trimethyl -orthovalerate and of phenylethynyl methyl diethyl ketal (34% yield) from phenylacetylene and triethyl orthoacetate. w-B utylpropiolaldehyde diethyl acetal was isolated in 32% yield by heating an equimolar mixture of 1-hexyne and triethyl orthoformate containing catalytic amounts of a zinc chloride-zinc iodide catalyst under autogenous pressure at 190° for 3 hours. 

Pentanoate (2,6-Di-tert.-butyl-4-methyl-phenyl) 4.4-Dimethyl-2-fluoro-3-hydroxy- EI Ob, 454 (R — (. HO + F —C H2 -COOR)... 

Hexanoate Methyl 5-<5-J 2-( 3.5-Bis-[tert.-butyl-dimethyl-silyloxyl-2-methylen-cyclohexyliden)-ethyliden J-1 -methyl-bicyclo [4.3.0]non-9-yl>-2,2-difluoro-F.lOb, 184 (CO - CFj)... 

Pentopyranosyl Fluoride 4.5-0-Benzylidene-3-(tert.-butyl-dimethyl-silyloxy)-2-0-methyl-F.lOa. 410 (OH -> F)... 

The corresponding 4-aminoquinolines were obtained in 42-98% yield. In the synthesis of 4-methyl-2-quinolinamine which was prepared in 49% yield, using N,N-dimethylcyclohexylamine as the tertiary amine component of the reaction mixture, N-mono-and N,N-dimethylated quinolinamines could also be isolated in 16% and 3% yield, respectively. If tributylamine was used as the tertiary amine component, the yield of 4-methyl-2-quinolinamine increased to 68% and N-butyl-4-methyl-2-quinolinamine was only formed in 6% yield. In the latter reaction pure 4-methyl-2-quinolinamine was easily obtained by recrystallizing the raw material. 

Phosphorsaure-[(tert.-butyl-dimethyl-silyl)-methyl-amid]-dichlorid (54%) wire durch Oxygenierung des ent-sprcchcndcn Phosphorigsaure-amid-dichlorids mit Dimethylsulfo.xid in exothermer Reaktion erhalten239 ... 

Table 1 Selected 1,3,4,6,7,8-hexahydro-2H-5-oxa-l-aza-phenanthren-6-yl derivatives and their corresponding physical properties. R- and S-enantiomers were prepared using either the (.R)- or (S )-[2-(f-butyl-(dimethyl-silanyloxy-methyl)-8-methyl-chroman-7-yl]-carbamic acid f-butyl ester in Step 1...

Methyl hydrazine Methyl isobutyl ketone Methyl isobutyrate Methyl, mercaptan Methyl methacrylate 1 -Methylnaphthalene 2-Methyl-2-propanethiol, see t-Butyl mercaptan Methyl-n-Propyl ketone 1 -Methylpyrrole Methyl salicylate a-Methyl styrene m.-p-Methyl styrene Methyl sulphate, see Dimethyl sulphate... 

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