wittig rearrangement造句

• It should not be confused with the Wittig rearrangement.
• The 1, 2-Wittig rearrangement can also be considered an example of this reaction type.
• Notable reactions include a [ 2, 3 ]-Still-Wittig rearrangement and a conformationally-controlled intramolecular Mannich cyclization.
• Metalation of allyl ether with alkyllithium or LDA forms an anion ? to the oxygen, and can proceed to 2, 3-Wittig rearrangement.
• If Y is nitrogen, the reaction is referred to as the Sommelet Hauser rearrangement; if Y is oxygen, then it is called a 2, 3-Wittig rearrangement ( not to be confused with the well-known Wittig reaction, which involves a phosphonium ylide ).