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Organic Reactions Volume 4 - Sciencemadness Dot Org

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Addends<br />

Methyl acetylenedicarboxylate<br />

Anthracene<br />

9-Bromoanthracene<br />

Butadiene<br />

/3-Chloroethyl sorbate<br />

Cycloheptadiene<br />

Cyclohexadiene 6<br />

TABLE IX—Continued<br />

THE DEBLS-ALDER ADDITION OF ACETYLENIC DIENOPHILES WITH ACYCLIC AND CARBOCYCLIC DIENES<br />

Products<br />

Dimethyl 9,10-dihydroanthracene-9,10-endo-«,/3-maleate<br />

(See footnote 21) f<br />

Dimethyl 9-bromo-9,10-dihydroanthracene-9,10-endo-a,fimaleate<br />

Dimethyl 3,6-dihydrophthalat«<br />

(See footnotes 8, 22)<br />

CH3<br />

[T^])CO2CH8<br />

VJ CO2CH3<br />

CO2CH2CH2Cl<br />

Dimethyl 3,6-propano-3,6-dihydrophthalate<br />

(See footnotes 8,<br />

23)<br />

Dimethyl 3,6-ethano-3,6-dihydrophthalate<br />

(See footnote 7)<br />

Ratio of<br />

Diene<br />

to Dienophile<br />

0.5<br />

1.0<br />

1.0<br />

1.0<br />

0.9<br />

Solvent<br />

None<br />

Xone<br />

None<br />

Xylene<br />

None<br />

None<br />

Temperature,<br />

0 C<br />

Room<br />

temp. 5<br />

10Ot.<br />

140<br />

198<br />

0<br />

Time,<br />

hours<br />

20<br />

8<br />

1<br />

1<br />

B.P. or<br />

M.P.<br />

160-161<br />

178<br />

—<br />

190-194/<br />

0.25 mm.<br />

—<br />

Yield,<br />

%<br />

100<br />

—<br />

84<br />

84<br />

References<br />

*<br />

60<br />

45<br />

50<br />

29<br />

54<br />

50<br />

O<br />

O<br />

><br />

Q<br />

g<br />

><br />

Q<br />

H<br />

O

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