I've used this split with some success. I found lifting heavy the first three days and then for hypertrophy the second set of three best.
I also changed lifts for heavy and hypertrophy days. Back squats, deads and presses were the center of my heavy day and front squats, straight leg deads or good mornings were the basis of my high rep day, with "accessory" work for chest and shoulders. Barbell rows heavy, cable or dumbell light et cetera and curls throughout.
The key is recovery. Eat lots of protein, 1.5-2.0 grams per pound (studies demonstrating less don't take futile turnover of such a routine into account. Usually they center around like 20 people who do 15 reps of leg extension or some ****), eat fruits and veggies for inflammation control and scarf carbs for energy and glycogen stores. Sleep is important