The phrase "as he split the" is correct and usable in written English.
It can be used in contexts where an action is being described, particularly in storytelling or narrative writing.
Example: "As he split the wood for the fire, he noticed the sun setting in the distance."
Alternatives: "while he divided the" or "as he cut the".
"You'd better go out and check your traps," he said as he split the kindling.
As he split the company into many decentralised divisions, he saw the need to breed people who could run them.
Defoe received a perfect pass from Jonathan Osorio as he split the defenders and beat Stefan Frei with a right-foot shot.
Max Comtois' outlet pass sprung Silverberg on a breakaway as he split the Blues' defensive pairing of Joel Edmundson and Colton Parayko and beat Johnson with a wrist shot over his glove.
Brilliant work by Eto'o as he splits the Mexico defence with a slid pass through to Moukandjo, but his centre isn't particularly well-directed, and Rodriguez is there at the near post to boot the thing clear.
Meanwhile, Tim's work relationship with his employer -- a large product-development firm -- had deteriorated as he split his time between the office and the hospital.
"Don't do it," he cautioned as he split a fat pod from the fava patch, exposing beans as big as his thumbs.
As directed, Dixon ran his pass route swiftly, accelerating as he split two defenders.
It looks like Gustave Doré's vision of Hell). Lee is a precisian, not a prober, and you can feel the film floundering as it seeks its proper focus; now and then, as he did in "Hulk," he splits the screen, like the Teichbergs dividing motel rooms into three to triple their income, but he lacks the will to nose around, to pull in and out of passing scenes, that Robert Altman brought to "Nashville".
Hinging his shaved head downward as he passes through the doorway, he splits the crowd, finding room toward the middle.
It has a high-class lineup for starters, including Paul McCartney, the Shins, Calexico and a characteristically overwrought Rufus Wainwright, making Baby, It's Cold Outside sound as if he's split the custard and the central heating is broken.
