Hydrochloric Acid → t-butyl 3-hydroxy-(R)-5-[(tetrahydro-2H-pyran-2-yl) oxy]-2-[(S)-p-tolylsulfinyl]-hexadecanoate

HRID 2106838Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 2106838
[C:1]1([CH3:17])[CH:6]=[CH:5][C:4]([S@:7]([CH2:9][C:10]([O:12][C:13]([CH3:16])([CH3:15])[CH3:14])=[O:11])=[O:8])=[CH:3][CH:2]=1.C([Mg]Br)(C)(C)C.[O:24]1[CH2:29][CH2:28][CH2:27][CH2:26][CH:25]1[O:30][C@H:31]([CH2:35][CH2:36][CH2:37][CH2:38][CH2:39][CH2:40][CH2:41][CH2:42][CH2:43][CH2:44][CH3:45])[CH2:32][CH:33]=[O:34].Cl>CCOCC.C1COCC1>[OH:34][CH:33]([CH2:32][CH:31]([O:30][CH:25]1[CH2:26][CH2:27][CH2:28][CH2:29][O:24]1)[CH2:35][CH2:36][CH2:37][CH2:38][CH2:39][CH2:40][CH2:41][CH2:42][CH2:43][CH2:44][CH3:45])[C@@H:9]([S@@:7]([C:4]1[CH:3]=[CH:2][C:1]([CH3:17])=[CH:6][CH:5]=1)=[O:8])[C:10]([O:12][C:13]([CH3:14])([CH3:16])[CH3:15])=[O:11]

Komponenten

7

Edukt 4

HCID 313Hydrochloric AcidHCID 11118618t-butyl [(S)-p-tolylsulfinyl]acetateHCID 14852578(R)-3-[(tetrahydro-2H-pyran-2-yl)oxy]tetradecanalHCID 178418586HCID 178418586, Verbindung

Produkt 1

HCID 67855726t-butyl 3-hydroxy-(R)-5-[(tetrahydro-2H-pyran-2-yl) oxy]-2-[(S)-p-tolylsulfinyl]-hexadecanoateAusbeute 67 %

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 3283Diethyl EtherLösungsmittelHCID 8028TetrahydrofuranLösungsmittel2×

Reaktionsbedingungen

Temperatur
-78 °C

Versuchsvorschrift

(G)(a) 16.5 g of t-butyl [(S)-p-tolylsulfinyl]acetate were dissolved in a mixture of 600 ml of ether and 60 ml of THF and cooled to -78° C. 43 ml of t-butylmagnesium bromide were then added dropwise in such a manner that the temperature remained below -70° C. After stirring at -78° C. for 1 hour 13.4 g of (R)-3-[(tetrahydro-2H-pyran-2-yl)oxy]-tetradecanal in 100 ml of THF were added dropwise. After 2 hours at -78° C. the reaction mixture was hydrolyzed with 2N hydrochloric acid and the solvent was evaporated off. The reaction mixture remaining behind was extracted with ether and the ethereal phase was dried and evaporated. After chromatography on silica gel there were obtained 14.9 g of t-butyl 3-hydroxy-(R)-5-[(tetrahydro-2H-pyran-2-yl)oxy]-2-[(S)-p-tolylsulfinyl]-hexadecanoate (67% yield). m.p. 97°-98° C.

Aufarbeitung

  1. customremained below -70° C
  2. additionwere added dropwise
  3. customthe solvent was evaporated off
  4. extractionThe reaction mixture remaining behind was extracted with ether
  5. customthe ethereal phase was dried
  6. customevaporated

Quellen und Nachweise

ORD-Eintrag
ord-e288097f49c74af89f285aad3836b016
Quelldatensatz
uspto-grants-1990_06
Patentnummer
US04931463

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