Search results
Results from the WOW.Com Content Network
Lithium borohydride (LiBH 4) is a borohydride and known in organic synthesis as a reducing agent for esters.Although less common than the related sodium borohydride, the lithium salt offers some advantages, being a stronger reducing agent and highly soluble in ethers, whilst remaining safer to handle than lithium aluminium hydride.
It has also been shown to reduce aromatic esters to the corresponding alcohols as shown in eq 6 and 7. LiBHEt 3 also reduces pyridine and isoquinolines to piperidines and tetrahydroisoquinolines respectively. [7] The reduction of β-hydroxysulfinyl imines with catecholborane and LiBHEt 3 produces anti-1,3-amino alcohols shown in (8). [8]
An ester of carboxylic acid.R stands for any group (organic or inorganic) and R′ stands for organyl group.. In chemistry, an ester is a compound derived from an acid (organic or inorganic) in which the hydrogen atom (H) of at least one acidic hydroxyl group (−OH) of that acid is replaced by an organyl group (−R).
In organic chemistry, carbonyl reduction is the conversion of any carbonyl group, usually to an alcohol. It is a common transformation that is practiced in many ways. [1] Ketones, aldehydes, carboxylic acids, esters, amides, and acid halides - some of the most pervasive functional groups, -comprise carbonyl compounds.
The industrial synthesis of diborane involves the reduction of BF 3 by sodium hydride (NaH), lithium hydride (LiH) or lithium aluminium hydride (LiAlH 4): [11] 8 BF 3 + 6 LiH → B 2 H 6 + 6 LiBF 4. Lithium hydride used for this purpose must be very finely powdered to avoid the formation of a passivating lithium tetrafluoroborate layer on the ...
We were always amazed that there was one for each of us, not realizing it was specific to our table. "The best things in life at a restaurant truly are free." Darron Cardosa.
Poor oral health could be a potential risk factor for cardiovascular disease. New research shows that good oral health habits, such as flossing, may reduce the risk of stroke and atrial ...
Partial reduction of acid chlorides to give the corresponding aldehyde product cannot proceed via LAH, since the latter reduces all the way to the primary alcohol. Instead, the milder lithium tri- tert -butoxyaluminum hydride , which reacts significantly faster with the acid chloride than with the aldehyde, must be used.