Detailed Instructions: In this task you will be given a text passage from a trivia quiz. You should choose the category this question belongs to from these categories: History, Science, Social Science, Fine Arts, Literature. You can only choose one category, so if in doubt, please choose the closest match.
Q: The Johnson-Corey Chaykovsky reaction produces them from carbonyl compounds through the action of a sulfonium ylide. They may also be synthesized by treating a halohydrin with a suitable base, which will catalyze a ring-closing SN2-style reaction similar to Williamson synthesis. Allylic alcohols can be treated with t-butylperoxide and titanium tetraisopropylate to produce them stereoselectively, a reaction that won a 2001 Nobel Prize for its discoverer, Barry Sharpless. Also the end result of the Prilezhaev [prih-leh-ZHEY-ev] reaction, they are produced by treating an alkene with a peroxyacid in a process also known as the "Butterfly Mechanism," and are highly reactive, in part due to their approximately 60-degree bond angles. FTP, name these compounds, cyclic ethers whose rings contain only three atoms.
A:
Science