Reaktion #54880

Reaktionsgleichung

5-bromo-1-pentene

1-chloro-4-acetoxy-8-nonene

1-chloro-8-nonen-4-one

1-chloro-8-nonen-4-ol

ethyl 4-(4-tert-butoxycarbonyl-5-oxohexyl)benzoate

ethyl 4-(4-acetyl-4-tert-butoxycarbonyl-8-acetoxytridec-12-en-1-yl)benzoate

ethyl 4-(4-acetyl-8-acetoxytridec-12-en-1-yl)benzoate

→

4-(4-acetyl-8-hydroxytridec-12-en-1-yl)benzoic acid

Reaktionsbedingungen

Aufarbeitung

1. 1
   SonstigeThe synthesis of this compound
2. 2
   SonstigeSubsequent steps afford in order

Vorschrift

The synthesis of this compound is carried out as described in Example 1, except that in Step B(1) an equivalent amount of 5-bromo-1-pentene is used in place of amyl bromide. The product of Step B(1) thus becomes 1-chloro-8-nonen-4-one. Subsequent steps afford in order: Step B(2), 1-chloro-8-nonen-4-ol; Step B(3), 1-chloro-4-acetoxy-8-nonene; Step C, ethyl 4-(4-tert-butoxycarbonyl-5-oxohexyl)benzoate (unchanged from Example 1); Step D, ethyl 4-(4-acetyl-4-tert-butoxycarbonyl-8-acetoxytridec-12-en-1-yl)benzoate (by substituting 1-chloro-4-acetoxy-8-nonene for 1-chloro-4-acetoxynonane); Step E, ethyl 4-(4-acetyl-8-acetoxytridec-12-en-1-yl)benzoate; and Step F, 4-(4-acetyl-8-hydroxytridec-12-en-1-yl)benzoic acid, obtained as a viscous yellowish oil.

Quelle