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
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
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. Propose a set of experimental conditions to bring about the alkylation in Step 1.
Account for the regioselectivity of the alkylation (i.e., that it takes place on the
carbon between the two carbonyl groups rather than on the other side of the ketone carbonyl). 

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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