Bis l-propenyl

Further exchange in Equations 31 and 32 would produce bis-(l-propenyl)iron(lll) species which reductively eliminate to produce the 2,4-hexadienes stereospecifically.(37)... 

Figure 13 Formation of artefacts in Allium chemistry. (A) AlUdn readily decomposes in a heated injector block forming two thioacrolein isomers before GC separation (62). (B) Bis-(l-propenyl)-disulflde rearranges at 85°C to thienyl compounds commonly found in Allium distillates (63).

Carbamothioic acid, bis(l-methylethyl)-, S-(2,3-dichloro-2-propenyl) ester ... 

The elegant biomimetic synthesis of carpanone by Chapman and coworkers commences with the base-induced isomerization of 2-allyl-4,5-methylenedioxyphenol (4)3 to 2-(/ran.y-l-propenyl)-4,5-methylenedioxyphenol (3) (see Scheme 2). Compound 3, as simple as it is, is actually the key intermediate in this synthesis oxidative dimerization of 3 could result in the formation of carpanone (1) through the intermediacy of the C2-symmetric and highly reactive bis(quinodimethide) 2. 

Benzyl-2,9-dimethyl-3-(3-methoxy-carbonyl-3-methoxycarbonylamino-l-propenyl)-5-oxo-5,9-dihydro-6H-(bis-[im idazo [1,2-a 4, 5 -d pyrim idin ) 24%... 

The complexes ( /4-cycloocta-l, 5-diene)bis(>/3-2-methyl-l-propenyl)-ruthenium(II), [ Ru(i/4-C8H12)(02CCCl3) 2(p-02CCCl3)2(/i-0H2)], and [ Ru( 4-C7H8)(02CCF3) 2(p-02CCCl3)2(p-0H2)] may be prepared by procedures similar to those described for the related complexes in Sections D, E, and G. 

Rhodium Bis- triphenylphosphan]-dicarbonyl-(3,3,3-trifluoro-l-trifluoromelhyl-l-propenyl)-... 

Methoxy(phenylthio)trimethylsilyl-methyllithium, 182 l-Methoxy-3-phenylthio-3-trimethyl-silyl-l-propenyl-3-lithium, 182 1 -Methoxy-4-(trimethylsilyl)-1 -butene-3-ynyl-2-lithium, 180 Methyllithium, 142, 188, 203, 214, 315 Methyllithium-Methylaluminum bis-(2,6-di-t-butyl-4-methylphenoxide), 203... 

Catalytic asymmetric intramolecular hydrosilylation of dialkyl- and diarylsilyl ethers of bis(2-propenyl)methanol (245) catalyzed by (R, R)-DIOP-Rh or (R)-binap-Rh complex, followed by Tamao oxidation, gives (2S, 3R)-2-methyl-4-pentene-l,3-diol (247) with 71-93% ee and excellent syn selectivity (syn/anti = 95/5- > 99/1) (equation 96)249. The enantioselectivity of this reaction depends on the bulkiness of the silyl moiety, i.e. the bulkier the substituent, the higher is the enantiopurity of the product, except for the case of 2-MeCgH4 R = Me, 80% ee (binap-Rh) R = Ph, 83% ee (DIOP-Rh) R = 2-McC.fiI I4, 4% ee (DIOP-Rh) R = 3-MeC6H4, 87% ee (DIOP-Rh) R = 3,5-Me2C6H3, 93% ee (DIOP-Rh). This methodology is successfully applied to the asymmetric synthesis of versatile poly oxygenated synthetic intermediate 249 (equation 97)249. 

Chemical Name 2,3,3-trichloro-2-propene-l-thiol diisopropylcarbamate S-(2,3,3-trichloro-allyl)diisopropyl-(thio-carbamate) A-(2,3,3-trichloro-2-propenyl) bis(l-methylethyl)-carbamothioate Uses herbicide to control wild oats in lentils, barley, peas, and winter wheat. 

Bis-[phosphomethyI]-carboxymethyI- E2, 303 Bis-[phosphomethyl)-isopropyl- E2, 303 Bis-[phosphomethylj-methyl- E2, 303 Bis-[phosphomethyl]-l-propenyl- E2, 303 Bis-[phosphomethyl]-propyl- E2, 303 Butyl-(diphunoxy-phosphoryl)-(diphenoxy-thiophos-phoryl)- XII/2, 971... 

Divalent [l,3-bis(trimethylsilyl)propenyl]2Sm(THF)2 (Figure 122) and (l,3-diphenylpropenyl)2Sm(THF)2 were synthesized by the reaction of potassium l,3-bis(trimethyl-silyl)propenide or potassium 1,3-diphenylpropenide with Sml2. 

Amin Bis-[phosphomethyl]-(l-propenyl)- E2, 303 (H3P03 + Amin + CH20)... 

DICHLORO-2-PROPENE-l-THIOL DIISOPROPYLCARB.MVIATE see DBI200 S-(2,3-DICHLORO-2-PROPENYL)ESTER,BIS(l-METHYI-ETHYL) CARBAMOTHIOIC ACID see DBI200 DICHLOROPROPIOXANILIDE see DGIOOO... 

When electron deficient alkenes are added to cyclopropene derivatives (74 equation 33) and (77 equation 34) in the presence of [Ni(COD)2], vinylcyclopropanes are formed in good yields. For example, dialkyl fumarate or maleate reacts with 3,3-dimethylcyclopropene in the presence of [Ni(COD)2] to give 2,3-bis(alkoxycarbonyl)-l-(2-methyl-l-propenyl)cyclopropanes (75), (76), (78) and (79), in which alkene stereochemistry is chiefly retained, in 50-73% yields. Reaction of methyl acrylate with 3,3-dimethylcyclopropene results in the formation of several products, while reaction of methyl acrylate with 3,3-diphenylcyclopropene gives vinylcyclopropane derivatives (80 equation 35) in 85% yield. Under similar conditions, methyl crotonate reacts with (74a) to give (82) in low yield (equation 36). Catalysis with nickel(0)/PR3, 2 [Ni(CO)4], 3 [Pd(DBA)2] or [Pd(DBA)2]/PlV33 gives mainly... 

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