Single post before with loop

single-post.php

<?php get_header(); ?>

    <div class="container" id="content-container">

      <div class="row content">
        <div class="eightcol left-column promo">

          <?php while ( have_posts() ) : the_post(); ?>

          <article id="post-<?php the_ID(); ?>">
            <h2 class="title"><?php the_title(); ?></h2>

              <!-- AddThis Button BEGIN -->
              <div class="addthis_toolbox addthis_default_style ">
                <a class="addthis_button_facebook"></a>
                <a class="addthis_button_twitter"></a>
                <a class="addthis_button_email last"></a>
              </div>
              <script type="text/javascript">var addthis_config = {"data_track_addressbar":true};</script>
              <script type="text/javascript" src="//s7.addthis.com/js/300/addthis_widget.js#pubid=ra-5127966e2c3c352f"></script>
              <!-- AddThis Button END -->

            <div class="promo-container">
              <?php the_content(); ?>
              <div class="promo-info" style="display: none"><?php the_field('rules'); ?></div>
            </div>
          </article>

        </div>
        <!-- end left-column -->
        
        <div class="fourcol sidebar last">
          <div class="widget details">
            <h4>Details</h4>

            <p class="promo-title"><?php the_title(); ?></p>

            <ul>
              <li>
                <i class="icon-calendar"></i>
                <p>Start Date: <?php the_time('D F d, Y'); ?></p>
              </li>
              <li>
                <i class="icon-time"></i>
                <p><?php the_field('promotion_time'); ?></p>
              </li>

              <li>
                <i class="icon-file-alt"></i>
                <p>
                  <a href="javascript:void(0);" class="rules-trigger">See Rules</a>
                  <a href="javascript:void(0);" class="close-trigger" style="display: none">Close Rules</a></p>
              </li>
            </ul>

            <p><?php the_field('sidebar_details'); ?></p>


          </div>

          <?php endwhile; ?>
        
          <?php get_sidebar(); ?>

          </div>
          <!-- end sidebar -->
      </div>
      <!-- end row.content -->

    </div>
    <!-- end content-container -->

<?php get_footer(); ?>