wittig reaction造句

例句与造句

1. Related to the Wittig reaction is the Peterson olefination.
2. In terms of reactivity, it resembles the Tebbe reagent and Wittig reaction.
3. In 1958, Leopold Horner published a modified Wittig reaction using phosphonate-stabilized carbanions.
4. Wittig reactions are most commonly used to couple aldehydes and ketones to singly substituted phosphine ylides.
5. Vedejs has put forth a theory to explain the stereoselectivity of stabilized and unstabilized Wittig reactions.
6. It's difficult to find wittig reaction in a sentence. 用wittig reaction造句挺难的
7. Phosphine oxides are typically ( and appropriately ) viewed as useless by-products in the Wittig reaction.
8. Because of its reliability and wide applicability, the Wittig reaction has become a standard tool for synthetic organic chemists.
9. Most of his scientific work, including the development of the Wittig reaction, was performed during this time in T黚ingen.
10. These compounds are used as reagents in the Wittig reaction, for instance methylenetriphenylphosphorane or Ph 3 P = CH 2.
11. In contrast to phosphonium ylides used in the Wittig reaction, phosphonate-stabilized carbanions are more nucleophilic but less basic.
12. Therefore like alkenes, phosphaalkenes engage in Wittig reactions, Peterson reactions, Cope rearrangements, and Diels-Alder reactions.
13. Thus, Wittig reaction of 3-methyl-2-furanacetaldehyde with triphenylphosphonium isopropylide gave rosefuran in 67 % yield.
14. Unlike the Wittig reaction, the Petasis reagent can react with a wide range of carbonyls, including aldehydes, ketones and esters.
15. Take a look, for example at the page on the Wittig reaction that is more or less how we would like it.
16. On the other hand, a prototypical Wittig reaction has especially poor atom economy ( merely 20 percent in the example shown ).
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