Naphthalene dihydro

Indeno[l, 2,3-crf pyTene, methyl-Naphthacene Naphthalene Naphthalene, dihydro-Naphthalene, dihydromethyl-Naphthalene, 1,2-dihydro-3-methyl-... 

Similarly, the isolated salt 39 reacts with naphthalene-1,8-diamine in dichloromethane at room temperature to afford the 2,3-dihydro-l//-perimidine 78 in 85% yield (92SC3141) (Scheme 24). 

Direct irradiation of substituted 1,4-dihydro-1,4-epoxy naphthalenes gives small quantities of 3-benzoxepins 16 amongst other products.144 146,256 The primary product of this reaction is probably a 3-oxaquadricyclane derivative which can react to give the benzoxepin under thermal conditions. The formation of benzoylindene compounds as the main products from the photochemical rearrangement of l,4-diphenyl-l,4-dihydro-l,4-epoxynaphthalenes has been shown to proceed via the corresponding 3-benzoxepins.146 The irradiation of naphthalene 1,4-oxides in the presence of a photosensitizer did not lead to benzoxepin derivatives.144... 

In a related study, the reaction of the enamine, l,2-dihydro-3-(2-methoxymethyl-l-pyrrolidin-yl)naphthalene [from 3,4-dihydro-2(l//)-naphthalenonc and (S)-2-(methoxymethyl)pyrrolidine] with 2-aryl-l-nitroethenes gave, after hydrolysis, an 83 17 to 95 5 mixture of the (3S,YR)- and (1/ ,1 T )-nitro ketones31. 

Dimethyleneperoxidecarbamide. See Vol 5, D1337-R 7-Hydroxy-1, 2-Dioxo-l, 2-Dihydro-Naphthalene. See this Vol, N20-R... 

The quantum-mechanical treatment previously applied to benzene, naphthalene, and the hydrocarbon free radicals is used in the calculation of extra resonance energy of conjugation in systems of double bonds, the dihydro-naphthalenes and dihydroanthracenes, phenylethylene, stilbene, isostilbene, triphenylethylene, tetraphenylethyl-... 

The secular equation for phenylethylene, in which a phenyl group is conjugated with a double bond, is the same as for 1,2-dihydro-naphthalene, and leads to the same value for the resonance energy. 

Since dihydroarylethenes are more reactive than the corresponding fully aromatic compounds, their use in the cycloaddition reactions is preferred in order to carry out the reactions under mild conditions with higher yields. Some reactions of 3,4-dihydro-1-vinylnaphthalene (103) [33], 3,4-dihydro-2-vinyl-naphthalene (104) [34], and l,2-dihydro-4-vinylphenanthrene (105) [35] with 4-acetoxy-2-cyclopentenone (98) and 2-inden-l-one (106) are summarized in Schemes 5.11-5.13. 

CiftHijNOjS 42399-49-5) see Diltiazem (4S)-3,4-dihydro-4-hydroxy-2-(3-methoxypropyl)-2H-thieno[3,2- ] 1 2-thiazme-6-sulfonainide 1,1-dioxide ( 10 16 2 65 154127-42-1) see Brinzolamide ( )-3 ,4"-dihydro-r-hydroxy-7 -methoxyspiro[cyclOpen-tane-l,2 (l -naphthalene]-r-acetonitrile (CirHjiNO 57 797-09-9) see Butorphanol 23-dihydro-3 hydroxy-l methyl-l indole-5,6-dione (C9H9NO3 54-06-8) see Caibazochrome... 

The transformation of carbazole has been examined, and naphthalene 1,2-dioxygenase activity was induced in Pseudomonas sp. strain NCIB 9816-4 and in Beijerinckia sp. strain B8/36 (Resnick et al. 1993). The 3-hydroxycarbazole that was formed could have resulted from two pathways (a) from the initial production of ciy-3,4-dihydro-3,4-dihydroxycarbazole followed by dehydration or (b) by monooxygenation that cannot be excluded since monooxygenase activity can be mediated by naphthalene 1,2-dioxygenase (Gibson et al. 1995). 

The benzo-derivative 16 is accessible through 1,4-dimethylnaphthalene, which on singlet oxygenation leads to the thermally labile naphthalene-1,4-endoperoxide. This endoperoxide expels singlet oxygen at ca. 10 °C, but diimide reduction below 0 °C in MeOH affords the stable dihydro derivative 16 (Eq. 11). 

To illustrate how this applies in the present circumstances we consider a passible group transfer reaction between A2 dihydro-naphthalene, (gQ) > a hydrogen donor, and phenanthrene,(g gr > a substrate (hydrogen acceptor) which models a polynuclear aromatic moiety commonly found in coal. In the overall group transfer reaction ... 

DHN. Apparently DHN both thermally dehyrogenates to naphthalene and disproportionates to Tetralin and naphthalene. In all of the runs, there was a sizable amount of hydrogen released when the reactors were opened. When DHN was heated at 450°C for either 15 or 180 minutes, the ratio of naphthalene to etralin was 1.8. Increased methyl indan formation occurred with time. With the introduction of dibenzyl, the anticipated [2] increased isomerization of T etralin to methyl indan occurred. These results suggest that the rearrangement of hydroaromatics does not proceed through the dihydro-... 

Almost all the reported compounds have been characterized with the help of various nuclear magnetic resonance (NMR) techniques. For previous studies of the compounds, refer to CHEC-II(1996) <1996CHEC-II(8)713>.The H NMR spectrum (300MHz) of 2,3,7-trirnethyl-3a,9a-dihydro-1,8-dithiaMa,5,9-triazacyclopenta[3]naphthalene-4,6-dione 47 <2000JHC1161> showed the presence of one quartet at 8 4.23 corresponding to the CH. Another broad singlet corresponds to the presence of the N-H proton. 

The reaction of potassium 3-amino-4-oxo-3,4-dihydroquinazoline-2-thiolate 62 with a-bromophenylacetic acid 63 resulted in the formation of (3-amino-4-oxo-3,4-dihydroquinazolin-2-ylsulfanyl)-phenyl-acetic acid methyl ester 64 which on alkali treatment and subsequent acidification resulted in the synthesis of 2-phenyl- 1-thia-4,4a,9-triaza-anthracene-3,10-dione 65 <1999JCR(S)86>. Similarly, the reaction of potassium 3-amino-5,6-dimethyl-4-oxo-3,4,4a,7a-tetrahydrothieno[2,3- pyrimidine-2-thiolate 66 with a-bromo-ester 67 resulted in the formation of 2-(3-amino-5,6-dimethyl-4-oxo-3,4,4a,7a-tetrahydrothieno[2,3- / pyrimidin-2-ylsulfanyl)-propionic acid ethyl ester 68. Subsequent treatment with alkali followed by acidification resulted in the formation of 2,3,7-trimethyl-3a,9a-dihydro-l,8-dithia-4a,5,9-triazacyclopenta[ ]naphthalene-4,6-dione 69 <2000JHC1161>... 

In order to eliminate competing reaction with the solvent, a method for generating active uranium in hydrocarbon solvents was desired. Thus a hydrocarbon soluble reducing agent [(TMEDA)Li ]9 [Nap] (Nap=naphthalene) was prepared. This complex has previously been maae from 1,4-dihydro-naphthalene(llO). We have prepared this complex from lithium, naphthalene and TMEDA in a convenient reaction which is amenable to large scale synthesis. 

In agreement with this, the analysis of the products forming during the alkylation over MCM-22 samples at different reaction time showed that about 80-90 wt. % of the recovered material is adsorbed on the external surface (phenol, o-TBP and p-TBP), whereas only about 10-20 wt.% is formed inside the zeolite ( coke constituted by p-TBP, naphthalenes, 9,10-dihydro-phenanthrene and acenaphthylene). Coke molecules could be formed in both supercages and sinusoidal channels. However, in the large supercages they would be converted into bulkier compounds, which is not the case. Therefore they are most likely located in the sinusoidal channels. 

Figure 12.5 Pyrogram of Mowilith 30, a vinyl acetate polymer used in conservation. Peak assignments 1, acetic acid 2, benzene 3, styrene 4, indene 5, 1,2 dihydro naphthalene 6, naphthalene 7, 2 methyl naphthalene 8, 1 methyl naphthalene 9, biphenyl 10, fluorene 11, anthracene...

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