import glob
from shutil import copy

allpdfs = glob.glob("C:/path/*")
validlist = ["item1.pdf", "item2.pdf", "item3.pdf"]

for itempath in allpdfs:
    item = itempath[8:]     # 8 should be replaced with the length (characters) of your path
    if item in validlist:
        print(item)
        copy(itempath, "C:/path-to-new-folder")