1-Bcnzyl

Benzoquinone Phenylacetic [Benzeneacetic arid] 2-Bcnzyl [2,5-Cyelohexadiene-1,4-dione, 2- (phenylmethy 1)-] 87 2... 

Von Trimethyl-benzyl-ammoniumsalzen wird teilweise aueh die Bcnzyl-Gruppe hydrogenolytiseh abgespal-ten, so daB in diesem Fall schlechtere Ausbeuten erhalten werden. 

Brommethyl-benzyl)- bzw. 5,6-Dimethoxy-2-(3,4-dimethoxy-2-brommethyl-bcnzyl)-isochinolinium-bromid wird in DMF unter Dehydrohalogenierung zu 5,6,11,12-Tetrahydro-5-aza-l,2-benzanthracen bzw. Xylopinin cyclisiert1 ... 

Bis-[4-mcthoxy-bcnzyl]- 414 Bis-[4-methoxy-phenyl]- 372 Bis-[2-nitro-phenyl]- 474 Bis-[2-phenyl-2-cyan-vinyl]- 676 Bis-[tetrahydrothienyl-(2)J-methyl]- 99 Diathyl-... 

Treatment of 210 with CF3CO2H afforded r /s-(iM-H-trans-A -II- -oxo-2-bcnzyl-6-hydroxyperhydropyrido[l,2-... 

Cerium(m) chloride could mediate high-yielding additions of /V-bcnzyl- ,/V-dilithio methanesulfonamide 12 to aldehydes and ketones of biologically importance (Scheme 5).9 Excess amount of CeCl3 (8.2 equiv.) afforded the adduct in excellent yield, while lower yield of the adduct was obtained in the absence of CeCl3. 

Formation of enantio- and diastereoenriched l-aza-4-oxa-7-thiabicyclo[3.3.0]octan-8-ones 453a and 453b was accomplished by ring closure of acyl-substituted. Y-bcnzyl thiocarbamates 452 in presence of Amberlyst 15 and 1,3-propanedithiol via a rearrangement of the oxazolidine ring (Equation 213) <2000JPR828>. 

Optical Spectra. The optical spectra of the unsymmetrical porphyrazines 65 and 66a-66d exhibit Soret bands between 330 and 375 nm and a split Q band, due to reduced symmetry between 650 and 700 nm. The peripherally metalated species 67d-67h do not have a split Q band, reflecting the extension of the pz n system into the five-membered chelate ring mediated by the bridging dithiolene. Table XVII compares the Q-band region of the optical spectra for 65, 66a-66c, 67b-67d to the symmetrical octa. V-bcnzyl porphyrazines 58, 59, 60a, 60b, 61a, and 61b to the analogous phthalocyanines (4). 

Alkylated 4,5-dihydrooxazoles possessing bulky side chains require stronger acid (6 N sulfuric acid) or longer heating time (6- 8 h) for hydrolysis2. 2-Bcnzyl-4,5-dihydrooxazoles partially racemize during hydrolysis because of the acidity of the benzylic hydrogens2. 

Substitutionsprodukte liefert, erhalt man mit lodmethan und mit Benzylhalogeniden eine bcvorzugte Alkylierung der Methylen-Gruppe dcs Bcnzyl-Restes1016. 

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