{"id":524586,"date":"2018-09-19T03:13:58","date_gmt":"2018-09-19T07:13:58","guid":{"rendered":"https:\/\/ntrs.nasa.gov\/search.jsp?R=20180005311"},"modified":"2018-09-19T03:13:58","modified_gmt":"2018-09-19T07:13:58","slug":"asymmetric-dianhyrdrides-and-methods-of-making-the-same","status":"publish","type":"post","link":"https:\/\/spaceweekly.com\/?p=524586","title":{"rendered":"Asymmetric Dianhyrdrides and Methods of Making the Same"},"content":{"rendered":"<p>Abstract: A method for preparing asymmetric 3,4&#8242;-(hexafluroisopropylidene) dipthalic anhydride (a-6FDA) and asymmetric 3,4&#8242;-(methylene)diphthalic anhydride (a-MDPA) from asymmetric 2,3,3&#8242;,4&#8242;-benzophenone dianhydride (a-BTDA). First, a-BTDA is converted to its corresponding N-alkyl or N-phenyl bisimides by reacting with either methylamine or aniline. The sequential addition of two trifluoromethyl (CF.sub.3) groups to the carbonyl unit of a-BTDA produce the corresponding bisimides of asymmetric 6FDA, whi&#8230;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Abstract: A method for preparing asymmetric 3,4&#8242;-(hexafluroisopropylidene) dipthalic anhydride (a-6FDA) and asymmetric 3,4&#8242;-(methylene)diphthalic anhydride (a-MDPA) from asymmetric 2,3,3&#8242;,4&#8242;-benzophenone dianhydride (a-BTDA). First, a-BTDA is converted&#8230;<\/p>\n","protected":false},"author":60,"featured_media":615444,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[],"tags":[],"class_list":["post-524586","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry"],"_links":{"self":[{"href":"https:\/\/spaceweekly.com\/index.php?rest_route=\/wp\/v2\/posts\/524586","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/spaceweekly.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/spaceweekly.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/spaceweekly.com\/index.php?rest_route=\/wp\/v2\/users\/60"}],"replies":[{"embeddable":true,"href":"https:\/\/spaceweekly.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=524586"}],"version-history":[{"count":1,"href":"https:\/\/spaceweekly.com\/index.php?rest_route=\/wp\/v2\/posts\/524586\/revisions"}],"predecessor-version":[{"id":524587,"href":"https:\/\/spaceweekly.com\/index.php?rest_route=\/wp\/v2\/posts\/524586\/revisions\/524587"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/spaceweekly.com\/index.php?rest_route=\/wp\/v2\/media\/615444"}],"wp:attachment":[{"href":"https:\/\/spaceweekly.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=524586"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/spaceweekly.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=524586"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/spaceweekly.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=524586"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}