3- 4-Hydroxy-3- -propenal

Cyclization of the ketosulfone (ix) with 2-chloro-3-hydroxy-propenal (xv) in the absence of ammonium acetate... 

Cyclization of the lithium enolate of the ketosulfone (iv) with 2,3-dichloroacrolein (xviii), obtained by treatment of 2-chloro-3-hydroxy-propenal (xv) with oxalyl chloride and DMF in toluene, followed by reaction with ammonium acetate or anhydrous ammonia... 

Hydroxy-propen- -O.O-diethylester XII/1, 574 1-Hydroxy-2,2,2-trichlor-ethan- -O.O-dimethylester E2, 442, 704... 

From the molecular beam MS of the pyrolysis products of the P/N fractions, a number of phenolic compounds were detected guaiacol (2-methoxyphenol) (m/z 124), catechols (m/z 110), isomers of substituted 2-methoxyphenols with alkyl groups such as methyl (m/z 138), vinyl (m/z 150), 3-hydroxy-propen(l)-yl (m/z 180), allyl (m/z 164), hydroxyethyl (m/z 168), and ethyl (152), most likely in the para position. In addition, a few carbohydrate-derived components are also present in this fraction such as furfuryl alcohol and other furfural derivatives. 

ALLYLIC ALCOHOL 3-HYDROXY-PROPENE ORVINYLCARBINOL PROPENOL PROPEN-l-OL-3... 

Allyl-l-formyl-cyclohexan139 448 g (4,0 mol) Formyl-cyclohexan, 242 g (4,17 mol) 3-Hydroxy-propen und 60 ml Benzol werden mit 0,2 g p-Toluolsulfonsaure an einer mit Dean-Stark-Wasserabscheider versehenen 60-cm-Fullkorper-Kolonne 22 Stdn. unter RiickfluB erhitzt, Blasen-Temp. 114—158°. Dabei scheiden sich 82 ml Wasser ab, anschlieBend wird destilliert Ausbeute 512 g (85%) Sdp. 105-107732 Torr (4,3 kPa). 

Chemically, wood tar is a complex mixture that contains at least 200 individual compounds, among which the foUowing have been isolated (1) 2-methoxyphenol, 2-methoxy-4-ethylphenol, 5-meth5i-2-methoxyphenol, 2,6-x5ienol, butyric acid, crotonic acid, 1-hydroxy-2-propanone, butyrolactone, 2-methyl-3-hydroxy-4JT-pyran-4-one, 2-methyl-2-propenal, methyl ethyl ketone, methyl isopropyl ketone, methyl furyl ketone, and 2-hydroxy-3-methyl-2-cyclopenten-l-one. 

Coniferyl aicohol [4-hydroxy-3-methoxy-cinnamyl alcohol, 3-(4-hydroxy-3-methoxy-phenyl)-2-propen-l-ol] [458-35-5] M 180.2, m 73-75°, b 163-165°/3mm, pK 9.54. It is... 

It was elaimed that eyelization of ethyl 2-ehloro-5-eyelopropyl-6- [(A-(4,5-dimethoxy-2-nitrophenyl)methoxy)earbonyl]-A-(2-fluoro-3-hydroxy-l-oxo-2-propen-l-yl)amino nieotinate (321) in boiling aqueous dioxane in the presenee of K2CO3 overnight yielded l- [(4,5-dimethoxy-2-nitrophe-nyl)methoxy]earbonyl -9-eyelopropyl-3-fluoro-2-oxo-2,6-dihydropyrido[l, 2-n]pyrimidine-7-earboxylate (160) (95MIP1, 96MIP4, 96USP5580872). 

Schreiber found that the monoalkylation of the lithium enolate of cyclonona-none with propene oxide could be cleanly effected by addition of AlMe3 to give the y-hydroxy ketone 145, a key intermediate for the synthesis of recifeiolide [69a]. 

Another application of this method is the stereoselective addition of (7 )-2-hydroxy-l,2,2-triphenylethyl acetate, via the lithium enolate, to propenal (acrolein) which affords mainly the ester 13 (d.r. 92 8). When the acid, obtained in the subsequent alkaline hydrolysis, is converted into the ammonium salt derived from (.S)-l -phenylethylaminc, and the salt recrystallized once, then the amine liberated (/f)-3-hydroxy-4-pentenoic acid is obtained in 41 % yield [relative to the (/ )-acetate] and >99.8% ee82. 

The naphthyl derived ligand, (5)-1-mcthyl-2-[(l-naphthylamino)methyl]pyrrolidine (4) is especially effective in the stereoselective additions of (Z)-l-cthylthio-l-trimethylsilyloxy-l-propene to aldehydes. Thus, quantitative formation of. yyn-adducts is achieved, in addition to high reagent-induced stereoselectivity (>98% ee for the 3-hydroxy thioester products)23 32. 

L PROLYLGLYCYLGLYCINE,At CARBO BEN ZOXY-3-HY DROXYETHYL ESTER [GLYCINE,N [AT 13-HYDROXY 1 -[ (PHENYLMETH-OXY)CARBONYL] -L PROLYL] GLYCYL] -, ETHYL ESTER], 88 Propane, 1-mtro-, 36 1,3 Propanedithiol, 9 Propanoic acid, 2-chloro-, 70 1-PROPENE, 3 ACETOXY-2-BROMO-1,1-D1PHENYL- [2-PROPFN-l-OI, 2-BROMO 3,3 DIPHENYL, ... 

Phenyl-3-(2-hydroxy-phenyl)-propen 88% d.Th. 4-Chlor-2-benzyl-phenot 97% d.Th. 

The mechanisms of the cyclisation of 2 -hydroxychalcone derivatives which can lead to flavanones, flavones and aurones have been reviewed <95MI1> and the formation of 3-hydroxy- chromanones and -flavanones from l-(2-hydroxyphenyl)-2-propen-l-ones via the epoxide has been optimised <96JOC5375>. 

Synonyms AA AI3-14312 Allyl al Allylic alcohol BRN 0605307 Caswell No. 026 CCRIS 747 EINECS 203-470-7 EPA pesticide chemical code 068401 3-Hydroxypropene 3-Hydroxy-propylene NSC 6526 Orvinyl carbinol Propenol Propenol-3 Propen-l-ol-3 l-Propenol-3 1-Propen-3-ol 2-Propenol 2-Propen-l-ol Propenyl alcohol 2-Propenyl alcohol RCRA waste number P005 UN 1098 Vinyl carbinol Weed drench. 

Q7H17N03 l-(2-Hydroxy-5-me1hylphenyl)-3-(4-methoxyphenyl)-2-propen-1-one oxime Gravimetric Extraction-photometric Cu, Ni, Pd Cu, V 3... 

O4AICIN2C34H54, Aluminum, dimethanol-1,2-bis(2-hydroxy-3,5-bis(tert-butyl)benzylide-neimino)ethane-, chloride, 34 17 O4BM0N6C16H17, Molybdenum(II), dicarbonyl hydridotris( 1 -py razolyl)borato 7)-(1,2,3)-(+)-( 1 R,2R)-1 -(methoxycarbonyl)-2-propen-l-yl -, 34 105 O4B2C12H4, Diborane(4), catechol derivative, 34 4... 

DL-Threonic acid (10) seemed to be a promising source of DL-threose. Therefore, other routes to 10 were elaborated. By a procedure consisting of five steps" 2-propenal (acrolein) — vinylglycoloni-trile — ethyl vinylglycolate — ethyl 4-bromocrotonate — 3-hydroxy-crotonic acid — 10, DL-threonic acid was obtained in an overall yield of 4.1%. Another synthesis of 10 was achieved17 in six steps starting... 

Oxymercuration-reduction of alkenes preparation of alcohols Addition of water to alkenes by oxymercuration-reduction produces alcohols via Markovnikov addition. This addition is similar to the acid-catalysed addition of water. Oxymercuration is regiospecific and auft -stereospecific. In the addition reaction, Hg(OAc) bonds to the less substituted carbon, and the OH to the more substituted carbon of the double bond. For example, propene reacts with mercuric acetate in the presence of an aqueous THF to give a hydroxy-mercurial compound, followed by reduction with sodium borohydride (NaBH4) to yield 2-propanol. 

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