4-Phenoxy-1-butene

Eycken and coworkers [121] employed ji-CDx as a chiral template for asymmetric induction in the intramolecular meta-photocycloaddition [126,127] of 4-phenoxy-1-butenes 48 and 50 in the solid state. (Scheme 19.)... 

Q -Hydroxy-3Q (tetrahydropyran-2-yloxy)-2/3-(3Q -tetrahydropyran-2-yloxy-4-phenoxy-trans-1-buten-1 -yl)cyclopent-1Q -yl] -acetaldehyde a-hemiacetal Chromic anhydride Methanesulfonyl isocyanate Acetic acid... 

In 1983, Nixon and Scheimann reported that 2-acyl(or formyl, methoxycarbonyl)-phenol can add to 4-(methoxycarbonyl)-2,3-butenoate to yield 4-(methoxycarbonyl)-3-(phenoxy)-3-buteneate 522. o-Hydroxyphenyl ketone, o-hydroxybenzaldehyde or o-hydroxybenzoic acid esters reacted with 4-methoxycarbonyl-2,3-butenoate in a... 

Butene l.l-Difluoro-2-phenoxy-4-pbcnyl-3-propanoyloxy- E10b2. 2(8 (Fduct)... 

As it is well known, acyloxy, alkoxy, or phenoxy groups connected to sp2-hybridized carbon atoms in alkenes or aromatics are unreactive to nucleophilic substitution. However, after alkene ozonolysis such groups become attached to sp3-hybridized carbon atoms and become reactive. It was shown <1989TL1511> that such substitutions have to be carried out at 40 °C when they compete with thermolytic reactions of the ozonides, lowering the yields. However, if 2,3-dichloropropene and as- or /ra/rt-1,2,4-trichloro-2-butene are ozonized, one obtains stable ozonides 68a-70... 

Chemical Name (E)-3-[2-[2-(Diethylamino)ethoxy]phenoxy]-4-phenyl-3-buten-2-one... 

The results from the reaction of ( )-2-butene and 3-phenoxy-l-propene using (5)-1-phenyl-ethanamine as the homochiral amine are shown in Table 4. Low yield and/or low asymmetric induction were generally observed. Lack of regioselectivity was observed with 1-butene. 

X-Hydroxy-1 lot, 15triphenyl-phosphonium bromide in a dry nitrogen atmosphere in 6.0 ml dry dimethyl sulfoxide wasadded 3.24 ml (6.5 mmols) of a 2.0M solution of sodium methylsulfinylmethide in dimethyl sulfoxide. To this red ylide solution was added dropwise a solution of 613 mg (1.29 mmols) 2-[50 -hydroxy-30 -(tetrahydropyran-2-yloxy)-2/3-(30 -tetrahydropyran-2-yloxy-4-phenoxy-trans-1-buten-1-yl)cyclopent-10 -yll acetaldehyde, 7-hemiacetal in 5.0 ml dry dimethyl sulfoxide over a period of 20 minutes. 

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