Imidazolidine, 2- - 1,3-diphenyl

H-IMIDAZO LE-2-CARBOXALDE-HYDE [10111-08-7], 72 Imidazolidine, 2-( 1,3-diphenyl-2-imid-azolidinylidene)-1,3-dip henyl-[2179-89-7], 50... 

Imidazolidine, 4,5-dichloro-l,3-diacetyl-imidazo[4,5-6]pyrazine synthesis from, 5, 646 Imidazolidine, 1,3-dimethyl-conformation, 5, 355 Imidazolidine, diphenyl-dehydrogenation, 5, 427 Imidazolidine, 2-imino-1-substituted nitration, 5, 427... 

Imidazole-5-thione, 4,4-diphenyl-tautomerism, 5, 368 3 H-Imidazole-2-thione, 1,3-dimethyl-structure, 5, 367 Imidazole-2-thiones acidity, 5, 367 betaines, 5, 372 synthesis, 5, 481 tautomerism, 5, 367 3H-Imidazole-2-thiones synthesis, 5, 473, 6, 992 Imidazolides deacylation, 5, 453 mass spectra, 5, 360 phosphoric acid reactions, 5, 454 reactions, 5, 451-453 Imidazolidine, l-alkyl-3-phenyl-N-oxidation, 5, 427 Imidazolidine, 1,3-benzyl-2-phenyl-oxidation, S, 427... 

Imidazolidine, 5-methyl-1,2-diphenyl-geometrical isomers, 5, 354 Imidazolidine, triketo-synthesis, 5, 466... 

The imidazolidine was prepared from an aldehyde with A,W -dimethyl-l,2-ethylenediamine (benzene, heat, 78% yield) and cleaved with Mel (Et20 H2O, 92% yield). Derivatization is chemoselective for aldehydes. The imidazolidine is stable to BuLi and LDA and to Li/NH3. The diphenylimidazolidine has been prepared analogously and can be cleaved with aqueous HCl." Alternatively, it can be prepared by using thionyl chloride (Pyr, CH2CI2, 0-25°, 7 h, 93% yield). A chiral version using -dimethyl-15,25-diphenyl-1,2-ethylenediamine has... 

Tliere is only one report concerning the reaction of A -(l-chloroalkyl)-pyridinium chlorides with secondary diamines (92BSB233). 2-Substituted 1,3-dimethyl- and 1,3-diphenyl-imidazolidines 79 have been prepared (75-95% yields) starting from either -dimethyl- or A, A -diphenylethane-1,2-diamines, respectively (Scheme 25). Reactions are particularly fast for the preparation of the 1,3-dimethylimidazolidines. Reaction times as short as 5 min have been claimed. 

Oxo-4-diphenyl-imidazottdin 2-Oxo-4-melhyl-4-(2-methyl-propyl)-imidazolidin 2-Oxo-4-methyl-4-nonyl-imidazolidin 2-Oxo-4-bis-[2-methyl-propyl]-imidazolidin 2-Oxo-4-diisopropyl- imidazvlidin... 

It is also possible to eliminate chloroform from trichloromethyl-substituted heterocycles. For example, A, iV -diphenyl-l,2-diaminoethane reacts with chloral to form l,3-diphenyl-2-(trichloromethyl)imidazolidin which loses one molecule of chloroform upon heating [Eq. (21)]. The l,3-diphenylimidazolidin-2-ylidene... 

The search for stable diaminocarbenes dates back to the early 1960s and is associated with the name of Wanziick." At that time the preparation of the 1,3-diphenyl imidazolidin-2-ylidenes (Ilia) was first examined (Scheme 8.4). Precursors of Ilia included the dimeric and electron-rich olefin IIIa 2 and the chloroform adduct 3a of the desired carbene. By means of cross-coupling experiments, however, it was shown that IIIa 2 was not in equilibrium with the two carbene units. On the other... 

This amino olefin was first prepared by thermal elimination of chloroform from 1,3-diphenyl-2-trichIormethy]imidazolidine,2and later by the procedure described here.3, 1 It can also be made by treatment of 1,3-diphenylimidazolinium salts with strong bases.5, 6... 

Imidazoline-2-thiones and imidazolidine-2-thiones react with 1,2-dibromoethane in the presence of aqueous sodium hydroxide and a charge transfer catalyst (CTC), or with a-cyanobenzyl benzenesulfonate, to give the corresponding imidazo[3,l-f>]thiazoles (equation 10) (80JHC393, 61JOC2715). In an analogous reaction, the condensation of 5,5-diphenyl-2-thiohydantoin with ethylene dibromide yielded two isomeric products, (99 major) and (100 minor) (8lJCS(P2)789). 

DIPHENTOIN DIPHENYLAN SODIUM DIPHENYLHYDANTOIN SODIUM 5,5-DIPHENYL-HYDANTOIN SODIUM 5,5-DIPHENYL-2,4-IMIDAZOLIDINE-DIONE, MONOSODIUM SALT DI-PHETINE DITOIN DIVULSAN DPH ENKEFAL... 

DIPHENYL-2,4-IMIDAZOLIDINE-DIONE, MONOSODIUM SALT see DNUOOO DIPHENYL KETONE see BCS250 DIPHEN"YLMERCURY see DWX)800 DIPHENYLMETHAN-4,4 -DIISOCYANAT(GERMAN ) see MJP400... 

Both 4,4-diaryl- and 5,5-diaryl-2-imidazoline-5- and -4-thiones are rearranged by aluminum chloride in benzene to 4,5-diarylimidazoles 5,5-diphenyl-4-imidazolidine-thiones, though, only give benzo[6]thiophenes under these conditions (76T2421). 

H5C6 —CH2—CH2—CO —S— C2H5 Aceton 2-3 0-5 l,3-Diphenyl-2 -(2 -phenyl-ethyl]-imidazolidin (3-Phenyl-propanal) 84 144 193... 

Die Reduktion von l,3-Diphenyl-2-(4-isopropyl-phenyl)-imidazolidin mit Natrium/ Ammoniak liefert neben 1,2-Dianilino-athan unter gleichzeitiger Reduktion des Aroma-ten 6-Methyl-3-isopropyl-cyclohexadien-( 1,4)2 ... 

The kinetic resolution of racemic 1-phenylethyl bromide was examined in the alkylation of benzoic acid using trisubstituted monocyclic guanidines as chiral sources [67]. (R)-Excess ester was obtained in 96% yield even with 15% ee, when the reaction was carried out in benzene with l,3-dimethyl-(45,55)-diphenyl-2-[(15)-phenylethylimino]imidazolidines [27a] (Scheme 4.25). 

Hocker and Merten have reported on some reactions of bis-(l,3-diphenyl-2-imidazolidinylidene) (334) (Scheme 20). Cleavage of (334) with primary amines or hydrazines gives amino-amidines (335), whereas secondary amines give 2-amino-imidazolidines (336). The proposed mechanism is somewhat obscure. When (334) reacts with acyl sulphonyl amines the products are imidazolinium salts (337). 

Phenyl-4,5-(D- / cero-L- /Mco-heptofurano)imidazolidine-2-thione, -p-tolyl-4-(j8-D-erythrofuranosyl)imidazoline-2-thione, 2,3-diphenyl-5-(a-D-lyxo-furanosyl)tetrazolium bromide, l-(2,3,4,6-tetra-0-acetyl-a-D-mannopyrano-syl)-A, A -dimethylisocyanuric acid. ... 

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