An ultraviolet absorbent composition, having ultraviolet absorbent A and a silicon compound, in which the ultraviolet absorbent A has a maximum absorption wavelength from 350 nm to 400 nm, a half value width of 55 nm or less, and the molar extinction coefficient of 20000 or more at the maximum absorption wavelength.
Electroreductive Dicarboxylation of Unactivated Skipped Dienes with CO<sub>2</sub>
A powerful electrochemical protocol that enables the first dicarboxylation of unactivated skipped dienes with CO2 is reported. Various valuable tethered adipic acids are formed in moderate-to-good yields under mild conditions, showing great potential in synthetic, medicinal and polymer chemistry.
报道了一种强大的电化学方案,该方案能够使未活化的跳过二烯与 CO 2进行首次双羧化。在温和条件下以中等到良好的产率形成各种有价值的系链己二酸,在合成、医药和高分子化学方面显示出巨大的潜力。