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Organic Reactions Volume 4 - Sciencemadness Dot Org

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Addends<br />

Crotonic acid (Cont'd)<br />

1,3-Dimethylbutadiene<br />

Isoprene<br />

1,1,3-Trimethylbutadiene<br />

Crotonolactone or<br />

AF'P-butenolide<br />

Butadiene<br />

TABLE V—Continued<br />

THE DIELS-AXDER ADDITION OF C^/S-UNSATURATED CARBONYL COMPOUNDS<br />

Products<br />

CH3<br />

fY° 2l£<br />

(See footnote 2) f<br />

(See footnote 2)<br />

CH3<br />

CH*<br />

fSc02H (CH3)<br />

H3C^JCH3 (CO2H)<br />

(i) (ii)<br />

(See footnotes 2, 10)<br />

A 4 -TetrahydrophthaIide (See<br />

footnotes 2, 27)<br />

Ratio of<br />

Diene<br />

to Dienophile<br />

1.8<br />

1.0<br />

1.0<br />

0.5<br />

—<br />

Solvent<br />

None<br />

None<br />

None<br />

None<br />

—<br />

—<br />

Temper­<br />

ature, 0 C<br />

180t.<br />

150t.<br />

18G1,<br />

150t.<br />

HOt.<br />

15O-190t.<br />

Time,<br />

hours<br />

3<br />

2-3<br />

—<br />

36<br />

48<br />

B.P.orM.P.<br />

98<br />

81-83<br />

82-83<br />

88.5-89<br />

*<br />

—<br />

88-92/<br />

1.5 mm.<br />

Yield,<br />

%<br />

—<br />

—<br />

0<br />

—<br />

References<br />

*<br />

84<br />

5<br />

5<br />

84<br />

28<br />

28<br />

O<br />

H-I<br />

O<br />

><br />

O<br />

H<br />

O<br />

GQ

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