00:01
Okay, for number 38, we have kind of a long problem.
00:06
We're starting off with 1, 2, 3, 4, 5.
00:14
This pentanal, this aldehyde.
00:17
We're going to react this with a variety of conditions.
00:20
I'll try to write a little bit smaller.
00:23
First, we're using sodium borohydide and methanol.
00:28
Of course, this is a reducing condition.
00:30
You can be thought of as an h -minus source.
00:34
It's going to attack the carbonyl directly.
00:37
We'll generate this primary alcohol.
00:47
For b, we're using lithium aluminum hydride, and then an aqueous workup.
00:57
Of course, this is also reducing a condition to access this product.
01:03
C, we're using pladium on carbon with hydrogen gas.
01:10
Again, this is reducing conditions.
01:12
So one of these hydrogens can be thought of.
01:16
It's an h -minus, which can add to the carbonyl.
01:19
The other hydrogen can be thought of as a proton.
01:21
So all at once, you're going to access that.
01:25
Next, we have some oxidizing condition, pcc, which actually should not oxidize this all the way up to the carboxylic acid.
01:34
It is supposed to be selective for alcohols up to the aldehyde and should not react any further.
01:40
Although in practice, sometimes you do see the carboxylic acid.
01:45
Next we have a much stronger oxidizing condition under this acidic condition.
01:58
In this case, we're definitely going to oxidize all the way up to the carboxylic acid.
02:04
This was d, this was e, okay, we've been right along.
02:10
Next we have f with silver oxide and ammonium hydroxide...