The second Wittig reaction uses a non-stabilised Wittig reagent, and as expected this gives mainly the cis product.

第二个维蒂希反应则使用的是一个活泼的维蒂希试剂，产物也主要是顺式。

Also, the high stereoselectivity of the Wittig olefination has been well rationalized.

同时，对该烯化反应所表现出的高度立体选择性作了合理解释。

Finally the Wittig - Horner reaction was selected as the fundamental reaction of synthesis.

最终选择Wittig-Horner反应作为合成的基本反应.

Wittig said Volkswagen needed to digest its deal with Porsche before considering other acquisitions.

Wittig还称,大众需要先消化掉与保时捷之间的交易,此后才可能考虑其它并购机会.