Acetate, butenyl

C13H20N2O4 133228-95-2) see Talinolol 4-(p-nitrophenoxy)-3-methyl-2-buten-l-ol (C11H13NO4 171180-10-2) see Troglitazone 4-(p-nitrophenoxy)-3-methyl-2-butenyl acetate (C13H15NO5 171180-09-9) see Troglitazone... 

The monoanions of primary nitroalkanes, phenylnitromethane, and a-nitro esters are all preferentially C-alkylated by cinnamyl acetate and 2-butenyl acetate in 50-89% yield in the presence of Pd catalyst (Eq. 5.51).75 The a-nitro ester gives the C-alkylate in 89% yield, but 2-nitropropane gives the C-alkylate in only 29% yield. The main product is cinnamaldehyde, which is derived from 0-alkylation.75a... 

This explanation is supported by the fact that 3-butenyl acetate copolymers... 

Addition of water (36) or alcohols (37—39) direcdy to butadiene at 40—100°C produces the corresponding unsaturated alcohols or ethers. Acidic ion exchangers have been used to catalyze these reactions. The yields for these latter reactions are generally very low because of unfavorable thermodynamics. At 50°C addition of acetic acid to butadiene produces the expected butenyl acetate with 60—100% selectivity at butadiene conversions of 50%. The catalysts are ion-exchange resins modified with quaternary ammonium, quaternary phosphonium, and ammonium substituted ferrocenyl ions (40). Addition of amines yields unsaturated alkyl amines. The reaction can be catalyzed by homogeneous catalysts such as Rh[P(C(5H5)3]3Q (41) or heterogeneous catalysts such as MgO and other solid bases (42). 

Industrial (BASF) syntheses of vitamin A and vitamin A aldehyde have been accomplished utilizing the aldehydes obtained from allyl acetate hydroformylation.22 Either aldehyde (10) or (11) reacts with the same phosphorus ylide to give vitamin A or retinal (Scheme 4). Hydroformylation of 3-methyl-2-butenyl acetate gives a high yield of 2-formyl-3-methylbutyl acetate. Elimination of acetic acid followed by isomerization provides trimethylacrylaldehyde, which is an intermediate in the synthesis of irones (Scheme 5). 

Under these reaction conditions, cyclopentenone, allyl acetate, and butenyl acetate are dicarboxylated in high yields (equations 69-71).96... 

SYNS 2-BUTEN-l-OL, 3-METHYL-, ACETATE DIMETHYL.M.LYL ACETATE 7,y-DIMETHYLALLYL ACETATE ISOPENT-2-ENYL ACETATE 3-METHYL-2-BUTENYL ACETATE PRENYL ACETATE... 

METHYL-2-BUTENYL ACETATE see DOQ350 3-METHYL-2-BUTENYL BENZOATE see MHU150 3-(3-METHYL-2-BUTENYL)-l,2,3,4,5,6-HEXAHYDRO-6,n-DIMETHYL-2,6-METHANO-3-BENZAZOCIN-8-OL see DOQ400... 

Dihydrotagetone (95) has been synthesized by dibenzoyl peroxide-initiated radical reaction of 3-methylbutanal (80) and the diethyl acetal (96) of methacrolein the product 97 (obtained in 42% yield) could be converted conventionally to dihydrotagetone (95). The same author has described the direct radical addition of 82 to 3-methyl-3-butenyl acetate. The product, 98, in this case was deacetylated by pyrolysis over ceramic beads to dihydrotagetone (95). ... 

Further studies on the Cj + Cj route to rose oxide (909) mentioned in Vol. 4 (p. 565, Ref. 773) include the radical addition of 3-methyl-3-butenyl acetate to 3-ethoxy-3-methylbutanal. This led to 40% of the ketone 926, which can be converted to rose oxides (cis/trans 9 1) by reduction (NaBH4), hydrolysis, and acid cyclization. °° Russian workers have examined (and with variously substituted homologs) the reaction between 3-methylbutanal (82) and 4,4-... 

F.17) 2-Buten-l-ol, 3-methyl-, acetate, 3-methyl-2-butenyl acetate, isopentenyl acetate, prenyl acetate [1191-16-8]... 

Rh6ne-Poulenc followed a corresponding strategy for Vitamin A acetate as weU. [76] ( )-4-Chloro-3-methyl-2-butenyl acetate is obtainable from isoprene in acetic acid and t-butyl hypochlorite. The corresponding bromoacetate is obtained using NBS. A disadvantage is the unsatisfactory yield, which stays usually below 50 %. [77] The elimination of benzenesulfinic acid in a homogeneous phase, with potassium alkoxides in methanol or pyridine, leads to a mixture of (aU E)- and (9Z)-isomers. This is remarkable, since besides the (aU )-actually... 

CAS 52210-18-1 EINECS/ELINCS 257-738-3 Synonyms 3-Buten-2-ol, 4-(2,6,6-trimethyl-2-cyclohexen-1-yl)-, acetate 4-(2,6,6-Trimethyl-2-cyclohexenyl)-2-butenyl acetate... 

Methyl-2-butenyl acetate. See Prenyl acetate 3-Methyl-2-butenyl benzoate. See Prenyl benzoate... 

Methylcinnamonitrile. See Methylcinnamonitrile y-Methylcinnamyl acetate CAS 20883-16-3 EINECS/ELINCS 244-098-5 Synonyms 3-Phenyl-2-butenyl acetate Uses Fragrance in cosmetics Methylcinnamyl alcohol CAS 1504-55-8 EINECS/ELINCS 216-128-7 Synonyms Cinnamyl alcohol, o-methyl- Methyl cinnamic alcohol o-Methyl cinnamic alcohol a-Methylcinnamyl alcohol P-Methylcinnamyl alcohol... 

Methylcyclohexenyl-butenyl acetate. See 3-(4-, Methylcyclohex-3-enyl) but-3-enyl acetate 3-(4-Methylcyclohex-3-enyl) but-3-enyl acetate CAS 6819-19-8 EINECS/ELINCS 229-894-2 Synonyms Methylcyclohexenyl-butenyl acetate Classification Ester... 

Trimethyl-2-cyclohexenyl)-2-butenyl acetate. See a-lonyl acetate 1-(2,6,6-Trimethyl-2-cyclohexenyl) hepta-1,6-dien-3-one. See Allyl a-ionone 4-(2,6,6-Trimethyl-2-cyclohexen-1-yl)-3-methyl-3-buten-2-one. See a-lsomethylionone 1-(2,6,6-Trimethyl-2-cyclohexenyl) pentan-3-one. See Dihydro-a-methyl a-ionone 1-(2,6,6-Trimethyl-2-cyclohexen-1-yl)-1-penten-3-one... 

With these substrates, achiral 1-24 is strongly favoured with Pd catalysts (for other metals, the situation is different) except in special cases. Diazaphos-pholidine-oxazoline 20 shows moderate performance in the alkylation of butenyl acetate compared to the exceptionally good results with SiocPhox phosphonamidate ligands for alkyl- and aryl-substituted substrates. The same type of ligands have also been applied to the alkylation of other challenging substrates such as polyenyl esters and acyclic ketone enolates. ... 

---