常見例句雙語例句Suitable hydroxy-protecting groups are ether-forming groups that can be removed easily after completion of all other reaction steps.任意基團在反應步驟完成后可以很容易地除去的基團都適合做羥基保護基團。blog.sina.com.cnIt is found that the etherification reaction of phenol hydroxy groups is a second order reaction and the ring closing reaction of chlorohydrin ether is a first order reaction.計算結果顯示,酚羥基醚化反應為二級反應,氯羥基醚閉環(huán)反應為一級反應。As an effective protection for hydroxy group in alcohols and phenols, the methods for the formation of tetrahydropyran ether and its cleavage employed in the last 15 years are reviewed.從四氫吡喃醚的合成及脫除方法介紹了二氫吡喃這種羥基保護試劑近十幾年來在有機合成中的應用。 返回 hydroxy ether