反应详情

The reaction of Example 2b was repeated using 4-(1,1,3,3,3-pentamethy-disiloxanyl)-butanol (see above) instead of 3-(1,1,3,3,3-pentamethy-disiloxanyl)-propanol as well as the above cyano-(2,3-dihydro-5-methoxy-2-methyl-1H-inden-1-ylidene)acetic acid 2-ethyl-hexyl ester instead of the product of example 1. After 9 hours of reaction time, the product was concentrated and then treated for another 5 hours as set forth above with new 3-(1,1,3,3,3-pentamethy-disiloxanyl)-propanol. The mixture was then concentrated and chromatographed as before to yield 30% of a liquid material. UV 347 nm (ε=32′500). This product had the same solubility and photostability qualities as described in Example 2b.

1. customThe reaction of Example 2b
2. customAfter 9 hours of reaction time
3. concentrationthe product was concentrated
4. additiontreated for another 5 hours
5. concentrationThe mixture was then concentrated
6. customchromatographed as before