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Question about LDA prep procedure
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So the grad students always make LDA by adding the BuLi at -78°C, but everywhere else I've seen seems to suggest adding at 0°C and going to -78 after 20 minutes. Also they usually leave it for two hours after adding the BuLi. How long should it actually take before I add in my ester? And how much of a difference does the 78° make?
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