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The reduction of both compounds with tin(II) chloride in acidic media was accompanied by acid hydrolysis that produced emodin anthrone, whose oxidative dimerization with iron (III) chloride hydrate gave the bianthrone in high yield. The oxidation of the bianthrone in the presence of Nethyldiisopropylamine gave protohypericin, which was converted into hypericin upon irradiation."}]}, "item_creator": {"attribute_name": "\u8457\u8005", "attribute_type": "creator", "attribute_value_mlt": [{"creatorNames": [{"creatorName": "Motoyoshiya,  J"}], "nameIdentifiers": [{"nameIdentifier": "41447", "nameIdentifierScheme": "WEKO"}]}, {"creatorNames": [{"creatorName": "Masue,  Y"}], "nameIdentifiers": [{"nameIdentifier": "41448", "nameIdentifierScheme": "WEKO"}]}, {"creatorNames": [{"creatorName": "Nishi,  Y"}], "nameIdentifiers": [{"nameIdentifier": "41449", "nameIdentifierScheme": "WEKO"}]}, {"creatorNames": [{"creatorName": "Aoyama,  H"}], "nameIdentifiers": [{"nameIdentifier": "41450", "nameIdentifierScheme": "WEKO"}]}]}, "item_files": {"attribute_name": "\u30d5\u30a1\u30a4\u30eb\u60c5\u5831", "attribute_type": "file", "attribute_value_mlt": [{"accessrole": "open_date", "date": [{"dateType": "Available", "dateValue": "2015-09-28"}], "displaytype": "detail", "download_preview_message": "", "file_order": 0, "filename": "P751112RR.pdf", "filesize": [{"value": "106.7 kB"}], "format": "application/pdf", "future_date_message": "", "is_thumbnail": false, "licensetype": "license_free", "mimetype": "application/pdf", "size": 106700.0, "url": {"label": "P751112RR.pdf", "url": "https://soar-ir.repo.nii.ac.jp/record/13548/files/P751112RR.pdf"}, "version_id": "d3588f96-594c-4c54-9b32-2710009ab155"}]}, "item_language": {"attribute_name": "\u8a00\u8a9e", "attribute_value_mlt": [{"subitem_language": "eng"}]}, "item_resource_type": {"attribute_name": "\u8cc7\u6e90\u30bf\u30a4\u30d7", "attribute_value_mlt": [{"resourcetype": "journal article", "resourceuri": "http://purl.org/coar/resource_type/c_6501"}]}, "item_title": "Synthesis of hypericin via emodin anthrone derived from a two-fold diels-alder reaction of 1,4-benzoquinone", "item_titles": {"attribute_name": "\u30bf\u30a4\u30c8\u30eb", "attribute_value_mlt": [{"subitem_title": "Synthesis of hypericin via emodin anthrone derived from a two-fold diels-alder reaction of 1,4-benzoquinone"}]}, "item_type_id": "6", "owner": "1", "path": ["1309/1310"], "permalink_uri": "http://hdl.handle.net/10091/518", "pubdate": {"attribute_name": "\u516c\u958b\u65e5", "attribute_name_i18n": "\u516c\u958b\u65e5", "attribute_value": "2007-11-16"}, "publish_date": "2007-11-16", "publish_status": "0", "recid": "13548", "relation": {}, "relation_version_is_last": true, "title": ["Synthesis of hypericin via emodin anthrone derived from a two-fold diels-alder reaction of 1,4-benzoquinone"], "weko_shared_id": null}