COOEt СООН COOEt (CH,),COOCH (CH,),COOH Ethyl 2-oxocyclo- pentanecarboxylate Br (CH,),COOH (CH,),COOH O (CH,),COOH Nef (CH2),COOCH3 reaction (CH2),COOCH3 n(CH2),COOCH, CH,NO, H aCH),COOCH3 H. 10 (CH2),COOH H (CH),COOH H (CH,),CH3 (CH2),CH3 (CH,),CH3 H. H HƠ CH3 Doxaprost (an orally active bronchodilator)

Chemistry
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ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
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Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Doxaprost, an orally active bronchodilator patterned after the natural prostaglandins , is synthesized in the following series of reactions starting with ethyl 2-oxocyclopentanecarboxylate. Except for the Nef reaction in Step 8, we have seen examples of all other types of reactions involved in this synthesis.

Q. Step 11 can best be described as a Grignard reaction with methylmagnesium
bromide under very carefully controlled conditions. In addition to the observed
reaction, what other Grignard reactions might take place in Step 11?

COOEt
СООН
COOEt
(CH,),COOCH
(CH,),COOH
Ethyl 2-oxocyclo-
pentanecarboxylate
Br
(CH,),COOH
(CH,),COOH O
(CH,),COOH
Nef
(CH2),COOCH3 reaction
(CH2),COOCH3
n(CH2),COOCH,
CH,NO,
H
aCH),COOCH3
H.
10
(CH2),COOH
H
(CH),COOH
H
(CH,),CH3
(CH2),CH3
(CH,),CH3
H.
H HƠ CH3
Doxaprost
(an orally active
bronchodilator)
Transcribed Image Text:COOEt СООН COOEt (CH,),COOCH (CH,),COOH Ethyl 2-oxocyclo- pentanecarboxylate Br (CH,),COOH (CH,),COOH O (CH,),COOH Nef (CH2),COOCH3 reaction (CH2),COOCH3 n(CH2),COOCH, CH,NO, H aCH),COOCH3 H. 10 (CH2),COOH H (CH),COOH H (CH,),CH3 (CH2),CH3 (CH,),CH3 H. H HƠ CH3 Doxaprost (an orally active bronchodilator)
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