反应详情

The compound was prepared according to the procedure described in Example 84 except that the reaction was worked up after 3 days. The following reagents were used: 4-methoxybenzaldehyde (13.5 g), diisopropylamine (32.2 mL). 1.6M n-butyl lithium in hexane (143 mL), acetaldehyde N-tert-butylimine (14.75 mL), diethyl chlorophosphonate (16.6 mL) and tetrahydrofuran (200 mL). The work up, varied only in that the oxalic acid catalyzed hydrolysis was done overnight at room temperature and then at 85° C. for 2 hours, furnished 12.5 g of crude product which was crystallized from ether-hexane to yield 10 g of (E)-3-(4-methoxyphenyl)-2-propenal, mp 58.5°-60° C.

1. customThe compound was prepared
2. customhydrolysis
3. waitwas done overnight at room temperature
4. waitat 85° C. for 2 hours
5. customfurnished 12.5 g of crude product which
6. customwas crystallized from ether-hexane