1.1
Solvents:
Chloroform
;
30 h, 90 °C; 90 °C → 0 °C
1.2
Reagents:
Triethyl phosphite
,
Ethyl chloroformate
;
0 °C → rt; 60 h, rt; rt → 0 °C
1.3
Reagents:
Titanium tetrachloride
Solvents:
Dichloromethane
;
15 min, 0 °C; 20 h, reflux; reflux → 0 °C
1.4
Reagents:
Water
;
0 °C

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