12:18:17,734 INFO  [xyzout] (ajp-/xx.xx.xx.xxx:1234-1) 2015-03-30 12:18:17,733:INFO . . . 
      [name_nname@email.domain.com.smb]: workingCreateQuotesFromabcdefData

awk -F, '                                                               # run awk with field separator set to ","
function dform(v){                                                      # convert time string to binary representation
                    gsub(/[-:]/," ",v)                                  # replace "-" and ":" with " " in v
                    return mktime(v)                                    # do conversion
                 }
           NR==1 {                                                      # at start of file
                    start = dform(start)                                # convert start parameter
                     end  = dform(end)                                  # and end
                 }
    dform($1)!=-1{                                                      # if first field is a valid time string
                    f = dform($1)>=start && dform($1) <= end ? 1 : 0    # set "doprint" var "f" if $1 within boundaries   
                 }f                                                     # print line if "f"
        ' start="$from" end="$to" $log1 > /script/xyz.txt               # supply boundaries and log file; redirect