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Trans--2-Pentene

In addition to being regioselective alcohol dehydrations are stereoselective A stereo selective reaction is one m which a single starting material can yield two or more stereoisomeric products but gives one of them m greater amounts than any other Alcohol dehydrations tend to produce the more stable stereoisomer of an alkene Dehydration of 3 pentanol for example yields a mixture of trans 2 pentene and cis 2 pentene m which the more stable trans stereoisomer predominates... [Pg.205]

Scheme 5 details the asymmetric synthesis of dimethylhydrazone 14. The synthesis of this fragment commences with an Evans asymmetric aldol condensation between the boron enolate derived from 21 and trans-2-pentenal (20). Syn aldol adduct 29 is obtained in diastereomerically pure form through a process which defines both the relative and absolute stereochemistry of the newly generated stereogenic centers at carbons 29 and 30 (92 % yield). After reductive removal of the chiral auxiliary, selective silylation of the primary alcohol furnishes 30 in 71 % overall yield. The method employed to achieve the reduction of the C-28 carbonyl is interesting and worthy of comment. The reaction between tri-n-butylbor-... [Pg.492]

Figure 11.2. Hydrogenation of 1-pentyne following hydrogenation of trans-2-pentene for Ih. Figure 11.2. Hydrogenation of 1-pentyne following hydrogenation of trans-2-pentene for Ih.
Styrene is reported to undergo reduction upon treatment with trifluoroacetic acid and triethylsilane,203 although competing polymerization reactions limit the yield of ethylbenzene to only 30% (Eq. 63).70 Vinylcyclopropane is reduced to ethylcy-clopropane within 30 minutes under similar conditions (Eq. 64) 232 It is important to note that the cyclopropane ring of ethylcyclopropane can be opened under these reaction conditions, albeit with longer reaction times, to give some trans-2-pentene in the final reaction mixture.233... [Pg.35]

Pentanol, 52, 22 trans-2-Pentenal, 4-hydroxy-4-methyl-, 54, 27 Pent-l-en-3-ol, 52, 22 trans-3-PENTEN-2-ONE, 51, 115 PERBENZOIC ACID, m-CHLORO-,... [Pg.133]

Fluoroethylene ozonide, 0752 /rMaleic anhydride ozonide, 1406 f 2-Methyl-1,3-butadiene, Ozone, 1893 3-Methyl-l,2,4-trioxolane, 1235 trans-2-Pentene ozonide, 1982... [Pg.320]

HETHYL-1-PENTENE 4-METHYL-cis-2-PENTENE 4-METHYL-trans-2-PENTENE TRIETHYLENEDIAMINE BUTYL VINYL ETHER CYCLOHEXANOL... [Pg.13]

PENTENE cis-2-PENTENE trans-2-PENTENE 2,3-DIBROHO-2-METHYLBUTANE... [Pg.37]

METHYL-trans-2-PENTENE 33.4412 -2.5983E+03 -9.1711E+00 -1.1438E-10 3.5389E-06 132 501... [Pg.39]

METHYL-trans-2-PENTENE TRIETHYLENEDIAMINE BUTYL VINYL ETHER CYCLOHEXANOL... [Pg.66]

C6H12 4-METHYL-trans-2-PENTENE 7.475E-04 501.00 -0.7143 132.35 475.95 1.426E-03 0.664... [Pg.159]

See other pages where Trans--2-Pentene is mentioned: [Pg.436]    [Pg.437]    [Pg.438]    [Pg.439]    [Pg.206]    [Pg.220]    [Pg.233]    [Pg.1207]    [Pg.1208]    [Pg.16]    [Pg.606]    [Pg.687]    [Pg.855]    [Pg.170]    [Pg.170]    [Pg.946]    [Pg.948]    [Pg.948]    [Pg.514]    [Pg.227]    [Pg.292]    [Pg.729]    [Pg.1090]    [Pg.4]    [Pg.36]    [Pg.55]    [Pg.11]    [Pg.64]    [Pg.92]    [Pg.94]    [Pg.119]    [Pg.121]    [Pg.157]    [Pg.183]    [Pg.185]    [Pg.122]    [Pg.939]    [Pg.109]    [Pg.217]   
See also in sourсe #XX -- [ Pg.193 , Pg.278 , Pg.280 ]



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4-METHYL-trans-2-PENTENE.189(Vol

Trans-1 -Iodo-3- -1 -pentene

Trans-2-PENTENE.47(Vol

Trans-3-PENTEN-2-ONE

Trans-3-Penten

Trans-3-Penten

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