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Organic Reactions Volume 4 - Sciencemadness Dot Org

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Addends<br />

Acetylethylene (Methyl<br />

Vinyl Ketone)<br />

Butadiene<br />

Cyclohexadiene<br />

2,3-Dimethylbutadiene<br />

Isoprene<br />

Sylvan<br />

Acrolein<br />

Butadiene<br />

Cyclohexadiene<br />

Cyclopentadiene<br />

TABLE V<br />

THE DrBiiS-ALDEK ADDITION OF ^JS-UNSATHRATED CABBONYL COMPOUNDS<br />

Products<br />

4-Acetylcyclohexene-l<br />

3,6-Ethano-4-acetyley clohexene-1<br />

1,2-Dimethyl-4-acetyley clohexene-1<br />

CH3 \I^J COCH5<br />

(See footnote 2)<br />

A 3 -Tetrahydrobenzaldehyde<br />

2,5-Ethano-A 3 -tetrahydrobenzaldehyde<br />

2,5-Methano-A 3 -tetrahy drobenzaldehyde<br />

Ratio of<br />

Diene<br />

to Dienophile<br />

—<br />

—<br />

—<br />

—<br />

1.0<br />

; 0.5<br />

1.2<br />

Solvent<br />

None<br />

None<br />

None<br />

None<br />

None<br />

; None<br />

None<br />

Ether<br />

Temper­<br />

ature, 0 C<br />

140t.<br />

140t.<br />

140t.<br />

140t.<br />

Room<br />

temp.<br />

lOOt.<br />

100t.<br />

Room<br />

I temp.<br />

Time,<br />

hours<br />

8-10<br />

8-10<br />

8-10<br />

8-10<br />

>320<br />

1<br />

24<br />

3.5<br />

B.P. or M.P.<br />

184r-185/<br />

747 mm. 7 f<br />

106-106.5/<br />

20 mm. 7<br />

218-220/<br />

747 mm. 7<br />

204.5-206/<br />

747 mm. 7<br />

—<br />

51-52/<br />

13 mm. 7 - 13<br />

84r-85/<br />

12 mm. 7<br />

70-72/<br />

20 mm. 7 - 13<br />

Yield,<br />

%<br />

75-80<br />

50<br />

75-80<br />

75-80<br />

0<br />

100<br />

Good<br />

90-95<br />

Refer­<br />

ences *<br />

81<br />

81<br />

81<br />

81<br />

82<br />

68<br />

12<br />

10,68<br />

O<br />

><br />

H-1<br />

O<br />

><br />

O<br />

H<br />

i—i<br />

O<br />

Ul

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