Propyl acetate nitrite

Prop-2-enyl trifluoromethanesulfonate, 1457 Propionyl hypobromite, 1150 Propionyl nitrite, 1181 Propiophenone, 3145 f Propyl acetate, 1971 f Propyl bromide, see 1-Bromopropane, 1237 f Propyl chloride, see 1-Chloropropane, 1239 Propylcopper(I), 1247... 

Pentanone Butyl formate Ethyl propionate Isobutyl formate Isopropyl acetate Methyl butyrate Methyl isobutyrate Propyl acetate Propyl acetate Isoamyl nitrite terJ-Amyl alcohol Isoamyl alcohol 3-Methyl-2-butanol... 

Pentanone, see Methyl n-propyl ketone 3- Pentanone, see Diethyl ketone Pentene, see Amylene n-Pentyl acetate, see n-Amyl acetate sec-Pentyl acetate, see sec-Amyl acetate Pentyl alcohol, see n-Amyl alcohol Pentyl amine, see n-Amylamine iso-Pentyl nitrite, see Amyl nitrite Peracetic acid (40% acetic acid 1.23 41... 

An improved synthesis7 of aldosterone acetate lb was based on the readily available dienone 30. Conversion to the nitrite and photolysis affords the oxime 31 with no attack on C19. On warming in iso-propyl alcohol this oxime 31, cyclized smoothly to the nitrone 32 with the loss of water. This nitrone is at the right oxidation level to rearrange to the 21-acetoxyimine. The overall yield of nitrone from 30 was 55%. 

Until relatively recently no kinetic studies on the nitrosation of alcohols had been reported, presumably since the reactions are very rapid and require special techniques. Some kinetic measurements on the reverse reaction, the hydrolysis of alkyl nitrites have been reported here conventional kinetic methods were used. Early workers examined the reactions of the series methyl, ethyl, i-propyl and t-butyl nitrites in an acetic acid-acetate buffer and found a small increase in rate constant along the series (Skrabal et a ., 1939). Later Allen measured the rate constants for the hydrolysis of a number of alkyl nitrites in aqueous dioxan solvent for both acid- and base-catalysed reactions (Allen, 1954). The rate constants for the O-nitrosation of alcohols were determined indirectly by measurement of the overall equilibrium constant for the process, by noting the change in the rate constant for the nitrosation of phenol in the presence of added alcohols. These, combined with the known data for the reverse hydrolysis reaction, enabled the rate constants for the forward reaction to be obtained (Schmid and Riedl, 1967). The reactivity sequence MeOH > EtOH > i-PrOH > t-BuOH was deduced, and attributed to a steric effect. 

N -lsopropyl-Ureido] -Acetic Acid Azide (5-Iso-propyl-hydantoin acid azide). (CH3)2CH.NH.CO.NH.CH2.CO.N3 mw 185.22 N 37.82% OB to CO2 -133.89% mp ca 100° (deflagrates quickly when heated). Prepn is by reacting [N-isopropyl-ureido] -acetic acid-hydra-zide with Na nitrite dissolved in aq HCl Ref Beil 4, 1169 ... 

The third procedure for the synthesis of phosphorylated diazoalkyl compounds is that of diazotization of the correspondingly substituted amino compounds, As a result of the ready availability of dimethyl and diethyl (aminomethyl)phosphonates, these form the most convenient starting materials for conversion into the dialkyl (diazomethyl)phospho-nate by the use of NaN02-acid . Latterly, the customary reagent combination has been that of propyl nitrite in acetic acid, and successful conversions have been described for 16 (Z = COOR CONHR and CN ). In the case of the last substrates, the diazo transfer procedure is said to be unsuitable, because of extensive side reactions which lead to phosphorylated 1,2,3-triazoles. Most reports have been concerned with the preparation of 1 -diazoalkyl compounds, and the syntheses of compounds in which the diazo group is sited elsewhere on the carbon skeleton are very rare ... 

Methyl acetate Trioxane Isopropyl nitrite Propyl nitrite Isopropyl alcohol Methylal Furan... 

Methyl acetate Isopropyl alcohol Propyl alcohol Ethyl acetate Methyl propionate Propyl formate Butyl nitrite Isobutyl nitrite Butyl alcohol... 

Acetone Ethyl formate Methyl acetate 1 -Chloropropane Isopropyl nitrite Propyl nitrite Isopropyl alcohol Methylal tert-Butyl alcohol Ethyl ether Cyclopentane Pentane... 

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