Green synthesis and characterisation of novel [1,3,4]thiadiazolo/benzo[4,5]thiazolo[3,2-a]pyrimidinesviamulticomponent reaction using vanadium oxide loaded on fluorapatite as a robust and sustainable catalyst

Kerru Nagaraju; Gummidi Lalitha; Maddila Surya Narayana; Bhaskaruni Sandeep V. H. S.; Maddila Suresh; Jonnalagadda Sreekantha B.

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Green synthesis and characterisation of novel [1,3,4]thiadiazolo/benzo[4,5]thiazolo[3,2-a]pyrimidinesviamulticomponent reaction using vanadium oxide loaded on fluorapatite as a robust and sustainable catalyst

机译：新的新型合成与表征新型[1,3,4]噻二唑/苯并[4,5]噻唑啉[3,2-a]嘧啶血氨酸，所述氧化钒在荧光石上负载氧化物作为鲁棒和可持续催化剂

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We synthesised materials with different loadings of vanadia on fluorapatite (V2O5/FAp), fully characterised their structural properties using various spectral techniques including TEM, BET, XRD, FT-IR, SEM and EDX and assessed their prowess as catalysts. The 2.5% V2O5/FAp exhibited excellent activity for the synthesis of novel [1,3,4]thiadiazolo[3,2-a]pyrimidines and benzo[4,5]thiazolo[3,2-a]pyrimidines. The one-pot three-component fusion reaction between chosen substrates of 1,3,4-thiadiazole-amines or 2-amino-benzothiazole, aldehydes and active methylene compounds in ethanol solvent at room temperature gave an excellent yield of products (90-97%) in a swift reaction (25-30 min). The advantages of this protocol are rapid synthesis, mild reaction conditions, green solvent, easy work-up, eco-friendliness, reusability of catalyst and no need for column chromatography.

机译：我们用不同载体（V2O5 / FAP）的不同载荷的合成材料，使用各种光谱技术完全表征其包括TEM，BET，XRD，FT-IR，SEM和EDX的各种光谱技术，并评估其司料作为催化剂。 2.5％V2O5 / FAP对新型的合成表现出优异的活性[1,3,4]噻唑啉[3,2-A]嘧啶和苯并[4,5]噻嗪[3,2-A]嘧啶。在室温下在乙醇溶剂中选择的1,3,4-噻唑 - 胺或2-氨基 - 苯并噻唑，醛和活性亚甲基化合物之间的单壶三组分融合反应，得到了产品的优异产量（90-97 ％）在Swift反应（25-30分钟）中。该方案的优点是合成快速合成，温和的反应条件，绿色溶剂，易于处理，生态友好性，催化剂的可重用性，无需柱色谱。

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《RSC Advances》 |2020年第34期|共8页
作者
Kerru Nagaraju; Gummidi Lalitha; Maddila Surya Narayana; Bhaskaruni Sandeep V. H. S.; Maddila Suresh; Jonnalagadda Sreekantha B.;
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Univ KwaZulu Natal Sch Chem &

Phys Westville Campus Chiltern Hills ZA-4000 Durban South Africa;

Univ KwaZulu Natal Sch Chem &

Phys Westville Campus Chiltern Hills ZA-4000 Durban South Africa;

Univ KwaZulu Natal Sch Chem &

Phys Westville Campus Chiltern Hills ZA-4000 Durban South Africa;

Univ KwaZulu Natal Sch Chem &

Phys Westville Campus Chiltern Hills ZA-4000 Durban South Africa;

Univ KwaZulu Natal Sch Chem &

Phys Westville Campus Chiltern Hills ZA-4000 Durban South Africa;

Univ KwaZulu Natal Sch Chem &

Phys Westville Campus Chiltern Hills ZA-4000 Durban South Africa;

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2. 6-SUBSTITUTED-(1,3,4)-THIADIAZOLO(AND THIAZOLO)(3,2-A)(1,2,3)TRIAZOLO(4,5-D)PYRIMIDINE-9(1H)-ONES [P] . 外国专利： IL75012A . 1988-12-30

机译：6-取代-（1,3,4）-噻唑并（和噻唑）（3,2-A）（1,2,3）三唑并（4,5-D）嘧啶-9（1H）-一

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Green synthesis and characterisation of novel [1,3,4]thiadiazolo/benzo[4,5]thiazolo[3,2-a]pyrimidinesviamulticomponent reaction using vanadium oxide loaded on fluorapatite as a robust and sustainable catalyst

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