@echo off
mode con lines=3000
set "folder1=D:\xxx\A"
set "folder2=D:\yyy\B"
if not exist "%folder1%" (echo;"%folder1%" not found&pause&exit)
if not exist "%folder2%" (echo;"%folder2%" not found&pause&exit)
set ext=jpg jpeg bmp png gif tif
for /f "delims=" %%a in ('dir /a-d-h/b/s "%folder2%\*.pdf"') do (
    set "f="
    for %%b in (%ext%) do (
        if exist "%folder1%\%%~na.%%b" set f=1
    )
    if defined f (
        echo;"%%a" --^> "%folder1%\"
        copy /y "%%a" "%folder1%\"
    )
)
pause
exit
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