4-Formyl-3-phenyl- 723

Ninhydrin liefert in saurem Milieu liber das l,3-Dihydroxy-2-oxo-indan 1,2,3-Trihy-droxy-indan. In alkalischem Milieu wird der Fiinfring reduktiv aufgespalten, und man erhalt u. a. (2-Formyl-phenyl)-glykolsaure12. 

Methyl-phenyIthio)-(4-nitro-phenyl)- 700 (2-Nitro-phcnyl)-(2-hydroxy-5-methyl-phenyl)- 693 (2-Nitro-phenyl)-(4-methoxy-phenyl)- 693 (2-Nitro-phenyl)-(4-methyl-phenyl)- 693 Phenyl-(4-amino-phenyl)- 568 Ph en yl-(4-formyl-phenyl) -... 

Arthur Lachman. The Spirit of Organic Chemistry (New York Macmillan, 1899) 71. Also see Russell, "Specialism and Its Hazards," 2021 and Ihde, The Development of Modern Chemistry, who notes that while Wilhelm Wislicenus in 1896 isolated two ethyl formyl phenyl acetates that had keto and enol properties, it was only in 1911 that each form of acetoacetic ester was isolated free of contamination by the other at temperatures around - 78°C (330). 

An intramolecular hetero-Diels-Alder reaction of o-thiobenzoquinone methides, generated in situ from bis(2-formyl-phenyl)disulfide and alkenols in the presence of iodine, has been used to prepare thiochromans (Scheme 22) <2003TL6513>. 

Man erhalt auf diese Weise z.B. aus N-Methyl-N-phenyl-formamid N-Methyl-anilin (70%), aus N.N-Diethyl-formamid Diethylamin (40%) und aus l,3-Bis-[formyl-phenyl-aminoj-propan 1,2-Dianilino-propan (79%). 

Table III shows a series of styryl compounds prepared from Schiff s bases of p-chloroaniline with 2- and 3-formyldibenzofuran, 2-(p-formyl-phenyl)benzo[b]furan, and 2-phenyl-6-formylbenzo[b]furan. (Further styryl derivatives from these anils are shown in Tables VI, VIII, XIV, and XVII.)...

The preparation of cyano-substituted styryl and stilbenyl compounds can be achieved38,39 by using sodium methoxide at room temperature. In this way, o-tolunitrile has been reacted with the anil of 2-(/>-formyl-phenyl)benzo[6]furan and / -chloroaniline (52) to give 2-(2-cyano-stilben-4 -yl)benzo[6]furan (53). 

Toluene-p- Benzylidene Picrate 3-Nitro- 2,4-Dinitro- Formyl Phenyl... 

Toluene-p- sulphon- amide °C Benzylidene derivative °C Picrate °C 3-Nitro- 2,4-Dinitro- Formyl Phenyl phthalimide phenyl derivative thiourea °C derivative °C °C °C ... 

Diphenyl- IV/ld, 410 2-(4-Formyl-phenyl)-l,3-dioxolan-4-yl-methoxy - polymergebun-den E14a/1, 242 (Polym.-o-Diol + Dial)... 

Kohlensaure -azid-(4-methoxy-phenylester) E4, 286 (Cl N3) Methan [(2-Formyl-phenyl)-hydrazono]-nitro- X/3, 518... 

Telluran(IV) (2-Formyl-phenyl)-dichloro-methyl- E12b, 554 (Chlorierung)... 

Telluronium Dimethyl-(2-formyl-phenyl)- (Iodide) E21b, 703 [CH(OR)2 -> CHO]... 

Acylier.) E5, 1156 (aus R-COOH), 1162 (aus Anhyd-rid) El6a, 833 (N-Acylier.) 2-(4-Formyl-phenyl)-l-phenyl- E16a, 614 (Diazen-Red.)... 

Bis-[4-dibrommethyl-phenyl]-hexafluor-propan > 2,2-Bis-[4-formyl-phenyl]-hexafluor-propan22 Oxalsaure23 24 ... 

Amino-4.6.biB-acetaniino-phenol IS, 570. Oxim dea [N A-Mothoxy-S-formyl-phenyl)-... 

Also obtained by reduction of 2,4,6-trihydroxy-3-formyl-phenyl benzyl ketone with hydrogen in acetic acid using 5% Pd/C as catalyst [5354]. 

The first examples of this kind of material belong to a homologous series of bis-azo-methines (113-114) which have the general structure represented in Table 9 [101]. The materials were prepared by esterification of (/ )-3-methyladipic acid with 4-hy-droxybenzaldehyde to the his-[4-formyl-phenyl] (/ )-3-methyladipate. This was then condensed with the appropriate 4-alkoxy-aniline to give the desired i>is-azomethine dimer. In this homologous series, only the early members (ethoxy, butoxy and hexy-loxy, compounds 113 to 115) showed chiral nematic phases the transition temperatures of these materials are given in Table 9. 

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